Update

operation/issue/issue.go

@@ -2,10 +2,10 @@ package issue
 
 import (
 	"context"
-	"encoding/json"
 	"fmt"
 
 	"gitea.com/gitea/gitea-mcp/pkg/gitea"
+	"gitea.com/gitea/gitea-mcp/pkg/to"
 	"github.com/mark3labs/mcp-go/mcp"
 )
 
@@ -16,6 +16,10 @@ const (
 var (
 	GetIssueByIndexTool = mcp.NewTool(
 		GetIssueByIndexToolName,
+		GetIssueByIndexOpt...,
+	)
+
+	GetIssueByIndexOpt = []mcp.ToolOption{
 		mcp.WithDescription("get issue by index"),
 		mcp.WithString(
 			"owner",
@@ -32,21 +36,17 @@ var (
 			mcp.Required(),
 			mcp.Description("repository issue index"),
 		),
-	)
+	}
 )
 
-func GetIssueByIndexFn(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
-	owner := request.Params.Arguments["owner"].(string)
-	repo := request.Params.Arguments["repo"].(string)
-	index := request.Params.Arguments["index"].(float64)
+func GetIssueByIndexFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
+	owner := req.Params.Arguments["owner"].(string)
+	repo := req.Params.Arguments["repo"].(string)
+	index := req.Params.Arguments["index"].(float64)
 	issue, _, err := gitea.Client().GetIssue(owner, repo, int64(index))
 	if err != nil {
 		return mcp.NewToolResultError(fmt.Sprintf("get %v/%v/issue/%v err", owner, repo, int64(index))), err
 	}
 
-	result, err := json.Marshal(issue)
-	if err != nil {
-		return mcp.NewToolResultError("marshal issue err"), err
-	}
-	return mcp.NewToolResultText(string(result)), nil
+	return to.TextResult(issue)
 }