Clarify tool description

Author: almaleksia

pkg/github/issues.go

@@ -499,7 +499,7 @@ func ListIssueTypes(getClient GetClientFn, t translations.TranslationHelperFunc)
 // AddIssueComment creates a tool to add a comment to an issue.
 func AddIssueComment(getClient GetClientFn, t translations.TranslationHelperFunc) (tool mcp.Tool, handler server.ToolHandlerFunc) {
 	return mcp.NewTool("add_issue_comment",
-			mcp.WithDescription(t("TOOL_ADD_ISSUE_COMMENT_DESCRIPTION", "Add a comment to a specific issue in a GitHub repository.")),
+			mcp.WithDescription(t("TOOL_ADD_ISSUE_COMMENT_DESCRIPTION", "Add a comment to a specific issue in a GitHub repository. Use this tool to add comments to pull requests as well (in this case pass pull request number as issue_number), but only if user is not asking specifically to add review comments.")),
 			mcp.WithToolAnnotation(mcp.ToolAnnotation{
 				Title:        t("TOOL_ADD_ISSUE_COMMENT_USER_TITLE", "Add comment to issue"),
 				ReadOnlyHint: ToBoolPtr(false),