feat: accept string or number for index parameters (#121)

This change makes index parameters more flexible by accepting both
numeric and string values. LLM agents often pass issue/PR indices
as strings (e.g., "123") since they appear as string identifiers in
URLs and CLI contexts. The implementation:

- Created pkg/params package with GetIndex() helper function
- Updated 25+ tool functions across issue, pull, label, and timetracking operations
- Improved error messages to say "must be a valid integer" instead of misleading "is required"
- Added comprehensive tests for both numeric and string inputs

This improves UX for MCP clients and LLMs while maintaining backward
compatibility with existing numeric callers.

Fixes: #121

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

operation/issue/issue.go

@@ -6,6 +6,7 @@ import (
 
 	"gitea.com/gitea/gitea-mcp/pkg/gitea"
 	"gitea.com/gitea/gitea-mcp/pkg/log"
+	"gitea.com/gitea/gitea-mcp/pkg/params"
 	"gitea.com/gitea/gitea-mcp/pkg/ptr"
 	"gitea.com/gitea/gitea-mcp/pkg/to"
 	"gitea.com/gitea/gitea-mcp/pkg/tool"
@@ -136,17 +137,17 @@ func GetIssueByIndexFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallT
 	if !ok {
 		return to.ErrorResult(fmt.Errorf("repo is required"))
 	}
-	index, ok := req.GetArguments()["index"].(float64)
+	index, err := params.GetIndex(req.GetArguments(), "index")
-	if !ok {
+	if err != nil {
-		return to.ErrorResult(fmt.Errorf("index is required"))
+		return to.ErrorResult(err)
 	}
 	client, err := gitea.ClientFromContext(ctx)
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
-	issue, _, err := client.GetIssue(owner, repo, int64(index))
+	issue, _, err := client.GetIssue(owner, repo, index)
 	if err != nil {
-		return to.ErrorResult(fmt.Errorf("get %v/%v/issue/%v err: %v", owner, repo, int64(index), err))
+		return to.ErrorResult(fmt.Errorf("get %v/%v/issue/%v err: %v", owner, repo, index, err))
 	}
 
 	return to.TextResult(issue)
@@ -235,9 +236,9 @@ func CreateIssueCommentFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.Ca
 	if !ok {
 		return to.ErrorResult(fmt.Errorf("repo is required"))
 	}
-	index, ok := req.GetArguments()["index"].(float64)
+	index, err := params.GetIndex(req.GetArguments(), "index")
-	if !ok {
+	if err != nil {
-		return to.ErrorResult(fmt.Errorf("index is required"))
+		return to.ErrorResult(err)
 	}
 	body, ok := req.GetArguments()["body"].(string)
 	if !ok {
@@ -250,9 +251,9 @@ func CreateIssueCommentFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.Ca
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
-	issueComment, _, err := client.CreateIssueComment(owner, repo, int64(index), opt)
+	issueComment, _, err := client.CreateIssueComment(owner, repo, index, opt)
 	if err != nil {
-		return to.ErrorResult(fmt.Errorf("create %v/%v/issue/%v/comment err: %v", owner, repo, int64(index), err))
+		return to.ErrorResult(fmt.Errorf("create %v/%v/issue/%v/comment err: %v", owner, repo, index, err))
 	}
 
 	return to.TextResult(issueComment)
@@ -268,9 +269,9 @@ func EditIssueFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolRes
 	if !ok {
 		return to.ErrorResult(fmt.Errorf("repo is required"))
 	}
-	index, ok := req.GetArguments()["index"].(float64)
+	index, err := params.GetIndex(req.GetArguments(), "index")
-	if !ok {
+	if err != nil {
-		return to.ErrorResult(fmt.Errorf("index is required"))
+		return to.ErrorResult(err)
 	}
 
 	opt := gitea_sdk.EditIssueOption{}
@@ -307,9 +308,9 @@ func EditIssueFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolRes
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
-	issue, _, err := client.EditIssue(owner, repo, int64(index), opt)
+	issue, _, err := client.EditIssue(owner, repo, index, opt)
 	if err != nil {
-		return to.ErrorResult(fmt.Errorf("edit %v/%v/issue/%v err: %v", owner, repo, int64(index), err))
+		return to.ErrorResult(fmt.Errorf("edit %v/%v/issue/%v err: %v", owner, repo, index, err))
 	}
 
 	return to.TextResult(issue)
@@ -358,18 +359,18 @@ func GetIssueCommentsByIndexFn(ctx context.Context, req mcp.CallToolRequest) (*m
 	if !ok {
 		return to.ErrorResult(fmt.Errorf("repo is required"))
 	}
-	index, ok := req.GetArguments()["index"].(float64)
+	index, err := params.GetIndex(req.GetArguments(), "index")
-	if !ok {
+	if err != nil {
-		return to.ErrorResult(fmt.Errorf("index is required"))
+		return to.ErrorResult(err)
 	}
 	opt := gitea_sdk.ListIssueCommentOptions{}
 	client, err := gitea.ClientFromContext(ctx)
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
-	issue, _, err := client.ListIssueComments(owner, repo, int64(index), opt)
+	issue, _, err := client.ListIssueComments(owner, repo, index, opt)
 	if err != nil {
-		return to.ErrorResult(fmt.Errorf("get %v/%v/issues/%v/comments err: %v", owner, repo, int64(index), err))
+		return to.ErrorResult(fmt.Errorf("get %v/%v/issues/%v/comments err: %v", owner, repo, index, err))
 	}
 
 	return to.TextResult(issue)

operation/label/label.go

@@ -6,6 +6,7 @@ import (
 
 	"gitea.com/gitea/gitea-mcp/pkg/gitea"
 	"gitea.com/gitea/gitea-mcp/pkg/log"
+	"gitea.com/gitea/gitea-mcp/pkg/params"
 	"gitea.com/gitea/gitea-mcp/pkg/ptr"
 	"gitea.com/gitea/gitea-mcp/pkg/to"
 	"gitea.com/gitea/gitea-mcp/pkg/tool"
@@ -380,9 +381,9 @@ func AddIssueLabelsFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallTo
 	if !ok {
 		return to.ErrorResult(fmt.Errorf("repo is required"))
 	}
-	index, ok := req.GetArguments()["index"].(float64)
+	index, err := params.GetIndex(req.GetArguments(), "index")
-	if !ok {
+	if err != nil {
-		return to.ErrorResult(fmt.Errorf("issue index is required"))
+		return to.ErrorResult(err)
 	}
 	labelsRaw, ok := req.GetArguments()["labels"].([]interface{})
 	if !ok {
@@ -405,9 +406,9 @@ func AddIssueLabelsFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallTo
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
-	issueLabels, _, err := client.AddIssueLabels(owner, repo, int64(index), opt)
+	issueLabels, _, err := client.AddIssueLabels(owner, repo, index, opt)
 	if err != nil {
-		return to.ErrorResult(fmt.Errorf("add labels to %v/%v/issue/%v err: %v", owner, repo, int64(index), err))
+		return to.ErrorResult(fmt.Errorf("add labels to %v/%v/issue/%v err: %v", owner, repo, index, err))
 	}
 	return to.TextResult(issueLabels)
 }
@@ -422,9 +423,9 @@ func ReplaceIssueLabelsFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.Ca
 	if !ok {
 		return to.ErrorResult(fmt.Errorf("repo is required"))
 	}
-	index, ok := req.GetArguments()["index"].(float64)
+	index, err := params.GetIndex(req.GetArguments(), "index")
-	if !ok {
+	if err != nil {
-		return to.ErrorResult(fmt.Errorf("issue index is required"))
+		return to.ErrorResult(err)
 	}
 	labelsRaw, ok := req.GetArguments()["labels"].([]interface{})
 	if !ok {
@@ -447,9 +448,9 @@ func ReplaceIssueLabelsFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.Ca
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
-	issueLabels, _, err := client.ReplaceIssueLabels(owner, repo, int64(index), opt)
+	issueLabels, _, err := client.ReplaceIssueLabels(owner, repo, index, opt)
 	if err != nil {
-		return to.ErrorResult(fmt.Errorf("replace labels on %v/%v/issue/%v err: %v", owner, repo, int64(index), err))
+		return to.ErrorResult(fmt.Errorf("replace labels on %v/%v/issue/%v err: %v", owner, repo, index, err))
 	}
 	return to.TextResult(issueLabels)
 }
@@ -464,18 +465,18 @@ func ClearIssueLabelsFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.Call
 	if !ok {
 		return to.ErrorResult(fmt.Errorf("repo is required"))
 	}
-	index, ok := req.GetArguments()["index"].(float64)
+	index, err := params.GetIndex(req.GetArguments(), "index")
-	if !ok {
+	if err != nil {
-		return to.ErrorResult(fmt.Errorf("issue index is required"))
+		return to.ErrorResult(err)
 	}
 
 	client, err := gitea.ClientFromContext(ctx)
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
-	_, err = client.ClearIssueLabels(owner, repo, int64(index))
+	_, err = client.ClearIssueLabels(owner, repo, index)
 	if err != nil {
-		return to.ErrorResult(fmt.Errorf("clear labels on %v/%v/issue/%v err: %v", owner, repo, int64(index), err))
+		return to.ErrorResult(fmt.Errorf("clear labels on %v/%v/issue/%v err: %v", owner, repo, index, err))
 	}
 	return to.TextResult("Labels cleared successfully")
 }
@@ -490,9 +491,9 @@ func RemoveIssueLabelFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.Call
 	if !ok {
 		return to.ErrorResult(fmt.Errorf("repo is required"))
 	}
-	index, ok := req.GetArguments()["index"].(float64)
+	index, err := params.GetIndex(req.GetArguments(), "index")
-	if !ok {
+	if err != nil {
-		return to.ErrorResult(fmt.Errorf("issue index is required"))
+		return to.ErrorResult(err)
 	}
 	labelID, ok := req.GetArguments()["label_id"].(float64)
 	if !ok {
@@ -503,9 +504,9 @@ func RemoveIssueLabelFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.Call
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
-	_, err = client.DeleteIssueLabel(owner, repo, int64(index), int64(labelID))
+	_, err = client.DeleteIssueLabel(owner, repo, index, int64(labelID))
 	if err != nil {
-		return to.ErrorResult(fmt.Errorf("remove label %v from %v/%v/issue/%v err: %v", int64(labelID), owner, repo, int64(index), err))
+		return to.ErrorResult(fmt.Errorf("remove label %v from %v/%v/issue/%v err: %v", int64(labelID), owner, repo, index, err))
 	}
 	return to.TextResult("Label removed successfully")
 }

operation/pull/pull.go

@@ -6,6 +6,7 @@ import (
 
 	"gitea.com/gitea/gitea-mcp/pkg/gitea"
 	"gitea.com/gitea/gitea-mcp/pkg/log"
+	"gitea.com/gitea/gitea-mcp/pkg/params"
 	"gitea.com/gitea/gitea-mcp/pkg/to"
 	"gitea.com/gitea/gitea-mcp/pkg/tool"
 
@@ -237,17 +238,17 @@ func GetPullRequestByIndexFn(ctx context.Context, req mcp.CallToolRequest) (*mcp
 	if !ok {
 		return to.ErrorResult(fmt.Errorf("repo is required"))
 	}
-	index, ok := req.GetArguments()["index"].(float64)
+	index, err := params.GetIndex(req.GetArguments(), "index")
-	if !ok {
+	if err != nil {
-		return to.ErrorResult(fmt.Errorf("index is required"))
+		return to.ErrorResult(err)
 	}
 	client, err := gitea.ClientFromContext(ctx)
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
-	pr, _, err := client.GetPullRequest(owner, repo, int64(index))
+	pr, _, err := client.GetPullRequest(owner, repo, index)
 	if err != nil {
-		return to.ErrorResult(fmt.Errorf("get %v/%v/pr/%v err: %v", owner, repo, int64(index), err))
+		return to.ErrorResult(fmt.Errorf("get %v/%v/pr/%v err: %v", owner, repo, index, err))
 	}
 
 	return to.TextResult(pr)
@@ -263,9 +264,9 @@ func GetPullRequestDiffFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.Ca
 	if !ok {
 		return to.ErrorResult(fmt.Errorf("repo is required"))
 	}
-	index, ok := req.GetArguments()["index"].(float64)
+	index, err := params.GetIndex(req.GetArguments(), "index")
-	if !ok {
+	if err != nil {
-		return to.ErrorResult(fmt.Errorf("index is required"))
+		return to.ErrorResult(err)
 	}
 	binary, _ := req.GetArguments()["binary"].(bool)
 
@@ -273,17 +274,17 @@ func GetPullRequestDiffFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.Ca
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
-	diffBytes, _, err := client.GetPullRequestDiff(owner, repo, int64(index), gitea_sdk.PullRequestDiffOptions{
+	diffBytes, _, err := client.GetPullRequestDiff(owner, repo, index, gitea_sdk.PullRequestDiffOptions{
 		Binary: binary,
 	})
 	if err != nil {
-		return to.ErrorResult(fmt.Errorf("get %v/%v/pr/%v diff err: %v", owner, repo, int64(index), err))
+		return to.ErrorResult(fmt.Errorf("get %v/%v/pr/%v diff err: %v", owner, repo, index, err))
 	}
 
 	result := map[string]interface{}{
 		"diff":   string(diffBytes),
 		"binary": binary,
-		"index":  int64(index),
+		"index":  index,
 		"repo":   repo,
 		"owner":  owner,
 	}
@@ -388,9 +389,9 @@ func CreatePullRequestReviewerFn(ctx context.Context, req mcp.CallToolRequest) (
 	if !ok {
 		return to.ErrorResult(fmt.Errorf("repo is required"))
 	}
-	index, ok := req.GetArguments()["index"].(float64)
+	index, err := params.GetIndex(req.GetArguments(), "index")
-	if !ok {
+	if err != nil {
-		return to.ErrorResult(fmt.Errorf("index is required"))
+		return to.ErrorResult(err)
 	}
 
 	var reviewers []string
@@ -420,12 +421,12 @@ func CreatePullRequestReviewerFn(ctx context.Context, req mcp.CallToolRequest) (
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
 
-	_, err = client.CreateReviewRequests(owner, repo, int64(index), gitea_sdk.PullReviewRequestOptions{
+	_, err = client.CreateReviewRequests(owner, repo, index, gitea_sdk.PullReviewRequestOptions{
 		Reviewers:     reviewers,
 		TeamReviewers: teamReviewers,
 	})
 	if err != nil {
-		return to.ErrorResult(fmt.Errorf("create review requests for %v/%v/pr/%v err: %v", owner, repo, int64(index), err))
+		return to.ErrorResult(fmt.Errorf("create review requests for %v/%v/pr/%v err: %v", owner, repo, index, err))
 	}
 
 	// Return a success message instead of the Response object which contains non-serializable functions
@@ -433,7 +434,7 @@ func CreatePullRequestReviewerFn(ctx context.Context, req mcp.CallToolRequest) (
 		"message":        "Successfully created review requests",
 		"reviewers":      reviewers,
 		"team_reviewers": teamReviewers,
-		"pr_index":       int64(index),
+		"pr_index":       index,
 		"repository":     fmt.Sprintf("%s/%s", owner, repo),
 	}
 
@@ -450,9 +451,9 @@ func DeletePullRequestReviewerFn(ctx context.Context, req mcp.CallToolRequest) (
 	if !ok {
 		return to.ErrorResult(fmt.Errorf("repo is required"))
 	}
-	index, ok := req.GetArguments()["index"].(float64)
+	index, err := params.GetIndex(req.GetArguments(), "index")
-	if !ok {
+	if err != nil {
-		return to.ErrorResult(fmt.Errorf("index is required"))
+		return to.ErrorResult(err)
 	}
 
 	var reviewers []string
@@ -482,19 +483,19 @@ func DeletePullRequestReviewerFn(ctx context.Context, req mcp.CallToolRequest) (
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
 
-	_, err = client.DeleteReviewRequests(owner, repo, int64(index), gitea_sdk.PullReviewRequestOptions{
+	_, err = client.DeleteReviewRequests(owner, repo, index, gitea_sdk.PullReviewRequestOptions{
 		Reviewers:     reviewers,
 		TeamReviewers: teamReviewers,
 	})
 	if err != nil {
-		return to.ErrorResult(fmt.Errorf("delete review requests for %v/%v/pr/%v err: %v", owner, repo, int64(index), err))
+		return to.ErrorResult(fmt.Errorf("delete review requests for %v/%v/pr/%v err: %v", owner, repo, index, err))
 	}
 
 	successMsg := map[string]interface{}{
 		"message":        "Successfully deleted review requests",
 		"reviewers":      reviewers,
 		"team_reviewers": teamReviewers,
-		"pr_index":       int64(index),
+		"pr_index":       index,
 		"repository":     fmt.Sprintf("%s/%s", owner, repo),
 	}
 
@@ -511,9 +512,9 @@ func ListPullRequestReviewsFn(ctx context.Context, req mcp.CallToolRequest) (*mc
 	if !ok {
 		return to.ErrorResult(fmt.Errorf("repo is required"))
 	}
-	index, ok := req.GetArguments()["index"].(float64)
+	index, err := params.GetIndex(req.GetArguments(), "index")
-	if !ok {
+	if err != nil {
-		return to.ErrorResult(fmt.Errorf("index is required"))
+		return to.ErrorResult(err)
 	}
 	page, ok := req.GetArguments()["page"].(float64)
 	if !ok {
@@ -529,14 +530,14 @@ func ListPullRequestReviewsFn(ctx context.Context, req mcp.CallToolRequest) (*mc
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
 
-	reviews, _, err := client.ListPullReviews(owner, repo, int64(index), gitea_sdk.ListPullReviewsOptions{
+	reviews, _, err := client.ListPullReviews(owner, repo, index, gitea_sdk.ListPullReviewsOptions{
 		ListOptions: gitea_sdk.ListOptions{
 			Page:     int(page),
 			PageSize: int(pageSize),
 		},
 	})
 	if err != nil {
-		return to.ErrorResult(fmt.Errorf("list reviews for %v/%v/pr/%v err: %v", owner, repo, int64(index), err))
+		return to.ErrorResult(fmt.Errorf("list reviews for %v/%v/pr/%v err: %v", owner, repo, index, err))
 	}
 
 	return to.TextResult(reviews)
@@ -552,9 +553,9 @@ func GetPullRequestReviewFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.
 	if !ok {
 		return to.ErrorResult(fmt.Errorf("repo is required"))
 	}
-	index, ok := req.GetArguments()["index"].(float64)
+	index, err := params.GetIndex(req.GetArguments(), "index")
-	if !ok {
+	if err != nil {
-		return to.ErrorResult(fmt.Errorf("index is required"))
+		return to.ErrorResult(err)
 	}
 	reviewID, ok := req.GetArguments()["review_id"].(float64)
 	if !ok {
@@ -566,9 +567,9 @@ func GetPullRequestReviewFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
 
-	review, _, err := client.GetPullReview(owner, repo, int64(index), int64(reviewID))
+	review, _, err := client.GetPullReview(owner, repo, index, int64(reviewID))
 	if err != nil {
-		return to.ErrorResult(fmt.Errorf("get review %v for %v/%v/pr/%v err: %v", int64(reviewID), owner, repo, int64(index), err))
+		return to.ErrorResult(fmt.Errorf("get review %v for %v/%v/pr/%v err: %v", int64(reviewID), owner, repo, index, err))
 	}
 
 	return to.TextResult(review)
@@ -584,9 +585,9 @@ func ListPullRequestReviewCommentsFn(ctx context.Context, req mcp.CallToolReques
 	if !ok {
 		return to.ErrorResult(fmt.Errorf("repo is required"))
 	}
-	index, ok := req.GetArguments()["index"].(float64)
+	index, err := params.GetIndex(req.GetArguments(), "index")
-	if !ok {
+	if err != nil {
-		return to.ErrorResult(fmt.Errorf("index is required"))
+		return to.ErrorResult(err)
 	}
 	reviewID, ok := req.GetArguments()["review_id"].(float64)
 	if !ok {
@@ -598,9 +599,9 @@ func ListPullRequestReviewCommentsFn(ctx context.Context, req mcp.CallToolReques
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
 
-	comments, _, err := client.ListPullReviewComments(owner, repo, int64(index), int64(reviewID))
+	comments, _, err := client.ListPullReviewComments(owner, repo, index, int64(reviewID))
 	if err != nil {
-		return to.ErrorResult(fmt.Errorf("list review comments for review %v on %v/%v/pr/%v err: %v", int64(reviewID), owner, repo, int64(index), err))
+		return to.ErrorResult(fmt.Errorf("list review comments for review %v on %v/%v/pr/%v err: %v", int64(reviewID), owner, repo, index, err))
 	}
 
 	return to.TextResult(comments)
@@ -616,9 +617,9 @@ func CreatePullRequestReviewFn(ctx context.Context, req mcp.CallToolRequest) (*m
 	if !ok {
 		return to.ErrorResult(fmt.Errorf("repo is required"))
 	}
-	index, ok := req.GetArguments()["index"].(float64)
+	index, err := params.GetIndex(req.GetArguments(), "index")
-	if !ok {
+	if err != nil {
-		return to.ErrorResult(fmt.Errorf("index is required"))
+		return to.ErrorResult(err)
 	}
 
 	opt := gitea_sdk.CreatePullReviewOptions{}
@@ -662,9 +663,9 @@ func CreatePullRequestReviewFn(ctx context.Context, req mcp.CallToolRequest) (*m
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
 
-	review, _, err := client.CreatePullReview(owner, repo, int64(index), opt)
+	review, _, err := client.CreatePullReview(owner, repo, index, opt)
 	if err != nil {
-		return to.ErrorResult(fmt.Errorf("create review for %v/%v/pr/%v err: %v", owner, repo, int64(index), err))
+		return to.ErrorResult(fmt.Errorf("create review for %v/%v/pr/%v err: %v", owner, repo, index, err))
 	}
 
 	return to.TextResult(review)
@@ -680,9 +681,9 @@ func SubmitPullRequestReviewFn(ctx context.Context, req mcp.CallToolRequest) (*m
 	if !ok {
 		return to.ErrorResult(fmt.Errorf("repo is required"))
 	}
-	index, ok := req.GetArguments()["index"].(float64)
+	index, err := params.GetIndex(req.GetArguments(), "index")
-	if !ok {
+	if err != nil {
-		return to.ErrorResult(fmt.Errorf("index is required"))
+		return to.ErrorResult(err)
 	}
 	reviewID, ok := req.GetArguments()["review_id"].(float64)
 	if !ok {
@@ -705,9 +706,9 @@ func SubmitPullRequestReviewFn(ctx context.Context, req mcp.CallToolRequest) (*m
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
 
-	review, _, err := client.SubmitPullReview(owner, repo, int64(index), int64(reviewID), opt)
+	review, _, err := client.SubmitPullReview(owner, repo, index, int64(reviewID), opt)
 	if err != nil {
-		return to.ErrorResult(fmt.Errorf("submit review %v for %v/%v/pr/%v err: %v", int64(reviewID), owner, repo, int64(index), err))
+		return to.ErrorResult(fmt.Errorf("submit review %v for %v/%v/pr/%v err: %v", int64(reviewID), owner, repo, index, err))
 	}
 
 	return to.TextResult(review)
@@ -723,9 +724,9 @@ func DeletePullRequestReviewFn(ctx context.Context, req mcp.CallToolRequest) (*m
 	if !ok {
 		return to.ErrorResult(fmt.Errorf("repo is required"))
 	}
-	index, ok := req.GetArguments()["index"].(float64)
+	index, err := params.GetIndex(req.GetArguments(), "index")
-	if !ok {
+	if err != nil {
-		return to.ErrorResult(fmt.Errorf("index is required"))
+		return to.ErrorResult(err)
 	}
 	reviewID, ok := req.GetArguments()["review_id"].(float64)
 	if !ok {
@@ -737,15 +738,15 @@ func DeletePullRequestReviewFn(ctx context.Context, req mcp.CallToolRequest) (*m
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
 
-	_, err = client.DeletePullReview(owner, repo, int64(index), int64(reviewID))
+	_, err = client.DeletePullReview(owner, repo, index, int64(reviewID))
 	if err != nil {
-		return to.ErrorResult(fmt.Errorf("delete review %v for %v/%v/pr/%v err: %v", int64(reviewID), owner, repo, int64(index), err))
+		return to.ErrorResult(fmt.Errorf("delete review %v for %v/%v/pr/%v err: %v", int64(reviewID), owner, repo, index, err))
 	}
 
 	successMsg := map[string]interface{}{
 		"message":    "Successfully deleted review",
 		"review_id":  int64(reviewID),
-		"pr_index":   int64(index),
+		"pr_index":   index,
 		"repository": fmt.Sprintf("%s/%s", owner, repo),
 	}
 
@@ -762,9 +763,9 @@ func DismissPullRequestReviewFn(ctx context.Context, req mcp.CallToolRequest) (*
 	if !ok {
 		return to.ErrorResult(fmt.Errorf("repo is required"))
 	}
-	index, ok := req.GetArguments()["index"].(float64)
+	index, err := params.GetIndex(req.GetArguments(), "index")
-	if !ok {
+	if err != nil {
-		return to.ErrorResult(fmt.Errorf("index is required"))
+		return to.ErrorResult(err)
 	}
 	reviewID, ok := req.GetArguments()["review_id"].(float64)
 	if !ok {
@@ -781,15 +782,15 @@ func DismissPullRequestReviewFn(ctx context.Context, req mcp.CallToolRequest) (*
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
 
-	_, err = client.DismissPullReview(owner, repo, int64(index), int64(reviewID), opt)
+	_, err = client.DismissPullReview(owner, repo, index, int64(reviewID), opt)
 	if err != nil {
-		return to.ErrorResult(fmt.Errorf("dismiss review %v for %v/%v/pr/%v err: %v", int64(reviewID), owner, repo, int64(index), err))
+		return to.ErrorResult(fmt.Errorf("dismiss review %v for %v/%v/pr/%v err: %v", int64(reviewID), owner, repo, index, err))
 	}
 
 	successMsg := map[string]interface{}{
 		"message":    "Successfully dismissed review",
 		"review_id":  int64(reviewID),
-		"pr_index":   int64(index),
+		"pr_index":   index,
 		"repository": fmt.Sprintf("%s/%s", owner, repo),
 	}
 

operation/timetracking/timetracking.go

@@ -8,6 +8,7 @@ import (
 	gitea_sdk "code.gitea.io/sdk/gitea"
 	"gitea.com/gitea/gitea-mcp/pkg/gitea"
 	"gitea.com/gitea/gitea-mcp/pkg/log"
+	"gitea.com/gitea/gitea-mcp/pkg/params"
 	"gitea.com/gitea/gitea-mcp/pkg/to"
 	"gitea.com/gitea/gitea-mcp/pkg/tool"
 
@@ -134,19 +135,19 @@ func StartStopwatchFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallTo
 	if !ok {
 		return to.ErrorResult(fmt.Errorf("repo is required"))
 	}
-	index, ok := req.GetArguments()["index"].(float64)
+	index, err := params.GetIndex(req.GetArguments(), "index")
-	if !ok {
+	if err != nil {
-		return to.ErrorResult(fmt.Errorf("index is required"))
+		return to.ErrorResult(err)
 	}
 	client, err := gitea.ClientFromContext(ctx)
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
-	_, err = client.StartIssueStopWatch(owner, repo, int64(index))
+	_, err = client.StartIssueStopWatch(owner, repo, index)
 	if err != nil {
-		return to.ErrorResult(fmt.Errorf("start stopwatch on %s/%s#%d err: %v", owner, repo, int64(index), err))
+		return to.ErrorResult(fmt.Errorf("start stopwatch on %s/%s#%d err: %v", owner, repo, index, err))
 	}
-	return to.TextResult(fmt.Sprintf("Stopwatch started on issue %s/%s#%d", owner, repo, int64(index)))
+	return to.TextResult(fmt.Sprintf("Stopwatch started on issue %s/%s#%d", owner, repo, index))
 }
 
 func StopStopwatchFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
@@ -159,19 +160,19 @@ func StopStopwatchFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToo
 	if !ok {
 		return to.ErrorResult(fmt.Errorf("repo is required"))
 	}
-	index, ok := req.GetArguments()["index"].(float64)
+	index, err := params.GetIndex(req.GetArguments(), "index")
-	if !ok {
+	if err != nil {
-		return to.ErrorResult(fmt.Errorf("index is required"))
+		return to.ErrorResult(err)
 	}
 	client, err := gitea.ClientFromContext(ctx)
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
-	_, err = client.StopIssueStopWatch(owner, repo, int64(index))
+	_, err = client.StopIssueStopWatch(owner, repo, index)
 	if err != nil {
-		return to.ErrorResult(fmt.Errorf("stop stopwatch on %s/%s#%d err: %v", owner, repo, int64(index), err))
+		return to.ErrorResult(fmt.Errorf("stop stopwatch on %s/%s#%d err: %v", owner, repo, index, err))
 	}
-	return to.TextResult(fmt.Sprintf("Stopwatch stopped on issue %s/%s#%d - time recorded", owner, repo, int64(index)))
+	return to.TextResult(fmt.Sprintf("Stopwatch stopped on issue %s/%s#%d - time recorded", owner, repo, index))
 }
 
 func DeleteStopwatchFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
@@ -184,19 +185,19 @@ func DeleteStopwatchFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallT
 	if !ok {
 		return to.ErrorResult(fmt.Errorf("repo is required"))
 	}
-	index, ok := req.GetArguments()["index"].(float64)
+	index, err := params.GetIndex(req.GetArguments(), "index")
-	if !ok {
+	if err != nil {
-		return to.ErrorResult(fmt.Errorf("index is required"))
+		return to.ErrorResult(err)
 	}
 	client, err := gitea.ClientFromContext(ctx)
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
-	_, err = client.DeleteIssueStopwatch(owner, repo, int64(index))
+	_, err = client.DeleteIssueStopwatch(owner, repo, index)
 	if err != nil {
-		return to.ErrorResult(fmt.Errorf("delete stopwatch on %s/%s#%d err: %v", owner, repo, int64(index), err))
+		return to.ErrorResult(fmt.Errorf("delete stopwatch on %s/%s#%d err: %v", owner, repo, index, err))
 	}
-	return to.TextResult(fmt.Sprintf("Stopwatch deleted/cancelled on issue %s/%s#%d", owner, repo, int64(index)))
+	return to.TextResult(fmt.Sprintf("Stopwatch deleted/cancelled on issue %s/%s#%d", owner, repo, index))
 }
 
 func GetMyStopwatchesFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
@@ -227,9 +228,9 @@ func ListTrackedTimesFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.Call
 	if !ok {
 		return to.ErrorResult(fmt.Errorf("repo is required"))
 	}
-	index, ok := req.GetArguments()["index"].(float64)
+	index, err := params.GetIndex(req.GetArguments(), "index")
-	if !ok {
+	if err != nil {
-		return to.ErrorResult(fmt.Errorf("index is required"))
+		return to.ErrorResult(err)
 	}
 	page, ok := req.GetArguments()["page"].(float64)
 	if !ok {
@@ -244,17 +245,17 @@ func ListTrackedTimesFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.Call
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
 
-	times, _, err := client.ListIssueTrackedTimes(owner, repo, int64(index), gitea_sdk.ListTrackedTimesOptions{
+	times, _, err := client.ListIssueTrackedTimes(owner, repo, index, gitea_sdk.ListTrackedTimesOptions{
 		ListOptions: gitea_sdk.ListOptions{
 			Page:     int(page),
 			PageSize: int(pageSize),
 		},
 	})
 	if err != nil {
-		return to.ErrorResult(fmt.Errorf("list tracked times for %s/%s#%d err: %v", owner, repo, int64(index), err))
+		return to.ErrorResult(fmt.Errorf("list tracked times for %s/%s#%d err: %v", owner, repo, index, err))
 	}
 	if len(times) == 0 {
-		return to.TextResult(fmt.Sprintf("No tracked times for issue %s/%s#%d", owner, repo, int64(index)))
+		return to.TextResult(fmt.Sprintf("No tracked times for issue %s/%s#%d", owner, repo, index))
 	}
 	return to.TextResult(times)
 }
@@ -269,9 +270,9 @@ func AddTrackedTimeFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallTo
 	if !ok {
 		return to.ErrorResult(fmt.Errorf("repo is required"))
 	}
-	index, ok := req.GetArguments()["index"].(float64)
+	index, err := params.GetIndex(req.GetArguments(), "index")
-	if !ok {
+	if err != nil {
-		return to.ErrorResult(fmt.Errorf("index is required"))
+		return to.ErrorResult(err)
 	}
 
 	timeSeconds, ok := req.GetArguments()["time"].(float64)
@@ -282,11 +283,11 @@ func AddTrackedTimeFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallTo
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
-	trackedTime, _, err := client.AddTime(owner, repo, int64(index), gitea_sdk.AddTimeOption{
+	trackedTime, _, err := client.AddTime(owner, repo, index, gitea_sdk.AddTimeOption{
 		Time: int64(timeSeconds),
 	})
 	if err != nil {
-		return to.ErrorResult(fmt.Errorf("add tracked time to %s/%s#%d err: %v", owner, repo, int64(index), err))
+		return to.ErrorResult(fmt.Errorf("add tracked time to %s/%s#%d err: %v", owner, repo, index, err))
 	}
 	return to.TextResult(trackedTime)
 }
@@ -302,9 +303,9 @@ func DeleteTrackedTimeFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.Cal
 		return to.ErrorResult(fmt.Errorf("repo is required"))
 	}
 
-	index, ok := req.GetArguments()["index"].(float64)
+	index, err := params.GetIndex(req.GetArguments(), "index")
-	if !ok {
+	if err != nil {
-		return to.ErrorResult(fmt.Errorf("index is required"))
+		return to.ErrorResult(err)
 	}
 	id, ok := req.GetArguments()["id"].(float64)
 	if !ok {
@@ -314,11 +315,11 @@ func DeleteTrackedTimeFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.Cal
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
-	_, err = client.DeleteTime(owner, repo, int64(index), int64(id))
+	_, err = client.DeleteTime(owner, repo, index, int64(id))
 	if err != nil {
-		return to.ErrorResult(fmt.Errorf("delete tracked time %d from %s/%s#%d err: %v", int64(id), owner, repo, int64(index), err))
+		return to.ErrorResult(fmt.Errorf("delete tracked time %d from %s/%s#%d err: %v", int64(id), owner, repo, index, err))
 	}
-	return to.TextResult(fmt.Sprintf("Tracked time entry %d deleted from issue %s/%s#%d", int64(id), owner, repo, int64(index)))
+	return to.TextResult(fmt.Sprintf("Tracked time entry %d deleted from issue %s/%s#%d", int64(id), owner, repo, index))
 }
 
 func ListRepoTimesFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {

pkg/params/params.go

@@ -0,0 +1,33 @@
+package params
+
+import (
+	"fmt"
+	"strconv"
+)
+
+// GetIndex extracts an index parameter from MCP tool arguments.
+// It accepts both numeric (float64 from JSON) and string representations.
+// This provides better UX for LLM callers that may naturally use strings
+// for identifiers like issue/PR numbers.
+func GetIndex(args map[string]interface{}, key string) (int64, error) {
+	val, exists := args[key]
+	if !exists {
+		return 0, fmt.Errorf("%s is required", key)
+	}
+
+	// Try float64 (JSON number type)
+	if f, ok := val.(float64); ok {
+		return int64(f), nil
+	}
+
+	// Try string and parse to integer
+	if s, ok := val.(string); ok {
+		i, err := strconv.ParseInt(s, 10, 64)
+		if err != nil {
+			return 0, fmt.Errorf("%s must be a valid integer (got %q)", key, s)
+		}
+		return i, nil
+	}
+
+	return 0, fmt.Errorf("%s must be a number or numeric string", key)
+}

pkg/params/params_test.go

@@ -0,0 +1,116 @@
+package params
+
+import (
+	"testing"
+)
+
+func TestGetIndex(t *testing.T) {
+	tests := []struct {
+		name      string
+		args      map[string]interface{}
+		key       string
+		wantIndex int64
+		wantErr   bool
+		errMsg    string
+	}{
+		{
+			name:      "valid float64",
+			args:      map[string]interface{}{"index": float64(123)},
+			key:       "index",
+			wantIndex: 123,
+			wantErr:   false,
+		},
+		{
+			name:      "valid string",
+			args:      map[string]interface{}{"index": "456"},
+			key:       "index",
+			wantIndex: 456,
+			wantErr:   false,
+		},
+		{
+			name:      "valid string with large number",
+			args:      map[string]interface{}{"index": "999999"},
+			key:       "index",
+			wantIndex: 999999,
+			wantErr:   false,
+		},
+		{
+			name:    "missing parameter",
+			args:    map[string]interface{}{},
+			key:     "index",
+			wantErr: true,
+			errMsg:  "index is required",
+		},
+		{
+			name:    "invalid string (not a number)",
+			args:    map[string]interface{}{"index": "abc"},
+			key:     "index",
+			wantErr: true,
+			errMsg:  "must be a valid integer",
+		},
+		{
+			name:    "invalid string (decimal)",
+			args:    map[string]interface{}{"index": "12.34"},
+			key:     "index",
+			wantErr: true,
+			errMsg:  "must be a valid integer",
+		},
+		{
+			name:    "invalid type (bool)",
+			args:    map[string]interface{}{"index": true},
+			key:     "index",
+			wantErr: true,
+			errMsg:  "must be a number or numeric string",
+		},
+		{
+			name:    "invalid type (map)",
+			args:    map[string]interface{}{"index": map[string]string{"foo": "bar"}},
+			key:     "index",
+			wantErr: true,
+			errMsg:  "must be a number or numeric string",
+		},
+		{
+			name:      "custom key name",
+			args:      map[string]interface{}{"pr_index": "789"},
+			key:       "pr_index",
+			wantIndex: 789,
+			wantErr:   false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			gotIndex, err := GetIndex(tt.args, tt.key)
+			if tt.wantErr {
+				if err == nil {
+					t.Errorf("GetIndex() expected error but got nil")
+					return
+				}
+				if tt.errMsg != "" && !contains(err.Error(), tt.errMsg) {
+					t.Errorf("GetIndex() error = %v, want error containing %q", err, tt.errMsg)
+				}
+				return
+			}
+			if err != nil {
+				t.Errorf("GetIndex() unexpected error = %v", err)
+				return
+			}
+			if gotIndex != tt.wantIndex {
+				t.Errorf("GetIndex() = %v, want %v", gotIndex, tt.wantIndex)
+			}
+		})
+	}
+}
+
+func contains(s, substr string) bool {
+	return len(s) >= len(substr) && (s == substr || len(s) > len(substr) && (s[:len(substr)] == substr || s[len(s)-len(substr):] == substr || containsMiddle(s, substr)))
+}
+
+func containsMiddle(s, substr string) bool {
+	for i := 0; i <= len(s)-len(substr); i++ {
+		if s[i:i+len(substr)] == substr {
+			return true
+		}
+	}
+	return false
+}