diff --git a/operation/repo/release.go b/operation/repo/release.go
index d0e1094..f4d62c3 100644
--- a/operation/repo/release.go
+++ b/operation/repo/release.go
@@ -221,8 +221,16 @@ func ListReleasesFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallTool
 	if !ok {
 		return nil, fmt.Errorf("repo is required")
 	}
-	isDraft, _ := req.GetArguments()["is_draft"].(bool)
-	isPreRelease, _ := req.GetArguments()["is_pre_release"].(bool)
+	var pIsDraft *bool
+	isDraft, ok := req.GetArguments()["is_draft"].(bool)
+	if ok {
+		pIsDraft = ptr.To(isDraft)
+	}
+	var pIsPreRelease *bool
+	isPreRelease, ok := req.GetArguments()["is_pre_release"].(bool)
+	if ok {
+		pIsPreRelease = ptr.To(isPreRelease)
+	}
 	page, _ := req.GetArguments()["page"].(float64)
 	pageSize, _ := req.GetArguments()["pageSize"].(float64)
 
@@ -231,8 +239,8 @@ func ListReleasesFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallTool
 			Page:     int(page),
 			PageSize: int(pageSize),
 		},
-		IsDraft:      ptr.To(isDraft),
-		IsPreRelease: ptr.To(isPreRelease),
+		IsDraft:      pIsDraft,
+		IsPreRelease: pIsPreRelease,
 	})
 	if err != nil {
 		return nil, fmt.Errorf("list releases error: %v", err)
diff --git a/operation/search/search.go b/operation/search/search.go
index 9fce5e1..71e0563 100644
--- a/operation/search/search.go
+++ b/operation/search/search.go
@@ -144,8 +144,16 @@ func SearchReposFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolR
 	keywordIsTopic, _ := req.GetArguments()["keywordIsTopic"].(bool)
 	keywordInDescription, _ := req.GetArguments()["keywordInDescription"].(bool)
 	ownerID, _ := req.GetArguments()["ownerID"].(float64)
-	isPrivate, _ := req.GetArguments()["isPrivate"].(bool)
-	isArchived, _ := req.GetArguments()["isArchived"].(bool)
+	var pIsPrivate *bool
+	isPrivate, ok := req.GetArguments()["isPrivate"].(bool)
+	if ok {
+		pIsPrivate = ptr.To(isPrivate)
+	}
+	var pIsArchived *bool
+	isArchived, ok := req.GetArguments()["isArchived"].(bool)
+	if ok {
+		pIsArchived = ptr.To(isArchived)
+	}
 	sort, _ := req.GetArguments()["sort"].(string)
 	order, _ := req.GetArguments()["order"].(string)
 	page, ok := req.GetArguments()["page"].(float64)
@@ -161,8 +169,8 @@ func SearchReposFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolR
 		KeywordIsTopic:       keywordIsTopic,
 		KeywordInDescription: keywordInDescription,
 		OwnerID:              int64(ownerID),
-		IsPrivate:            ptr.To(isPrivate),
-		IsArchived:           ptr.To(isArchived),
+		IsPrivate:            pIsPrivate,
+		IsArchived:           pIsArchived,
 		Sort:                 sort,
 		Order:                order,
 		ListOptions: gitea_sdk.ListOptions{