PyGithub MCP Server

Instructions

Args:
    params: Parameters for updating a comment including:
        - owner: Repository owner (user or organization)
        - repo: Repository name
        - issue_number: Issue number containing the comment
        - comment_id: Comment ID to update
        - body: New comment text

Returns:
    Updated comment details from GitHub API

Implementation Reference

• src/pygithub_mcp_server/tools/issues/tools.py:277-311 (handler)

  MCP tool handler function for 'update_issue_comment'. It takes parameters, delegates to the operations layer, handles errors, and returns an MCP-formatted response.

  @tool()
  def update_issue_comment(params: UpdateIssueCommentParams) -> dict:
      """Update an issue comment.
      
      Args:
          params: Parameters for updating a comment including:
              - owner: Repository owner (user or organization)
              - repo: Repository name
              - issue_number: Issue number containing the comment
              - comment_id: Comment ID to update
              - body: New comment text
      
      Returns:
          Updated comment details from GitHub API
      """
      try:
          logger.debug(f"update_issue_comment called with params: {params}")
          # Pass the Pydantic model directly to the operation
          result = issues.update_issue_comment(params)
          logger.debug(f"Got result: {result}")
          return {"content": [{"type": "text", "text": json.dumps(result, indent=2)}]}
      except GitHubError as e:
          logger.error(f"GitHub error: {e}")
          return {
              "content": [{"type": "error", "text": format_github_error(e)}],
              "is_error": True
          }
      except Exception as e:
          logger.error(f"Unexpected error: {e}")
          logger.error(traceback.format_exc())
          error_msg = str(e) if str(e) else "An unexpected error occurred"
          return {
              "content": [{"type": "error", "text": f"Internal server error: {error_msg}"}],
              "is_error": True
          }

• src/pygithub_mcp_server/schemas/issues.py:301-317 (schema)

  Pydantic schema class UpdateIssueCommentParams defining input parameters and validation for the update_issue_comment tool.

  class UpdateIssueCommentParams(RepositoryRef):
      """Parameters for updating an issue comment."""
  
      model_config = ConfigDict(strict=True)
      
      issue_number: int = Field(..., description="Issue number containing the comment")
      comment_id: int = Field(..., description="Comment ID to update")
      body: str = Field(..., description="New comment text")
      
      @field_validator('body')
      @classmethod
      def validate_body(cls, v):
          """Validate that body is not empty."""
          if not v.strip():
              raise ValueError("body cannot be empty")
          return v

• src/pygithub_mcp_server/tools/issues/tools.py:439-463 (registration)

  Registration function that adds the update_issue_comment tool (and other issue tools) to the MCP server instance.

  def register(mcp: FastMCP) -> None:
      """Register all issue tools with the MCP server.
      
      Args:
          mcp: The MCP server instance
      """
      from pygithub_mcp_server.tools import register_tools
      
      # List of all issue tools to register
      issue_tools = [
          create_issue,
          list_issues,
          get_issue,
          update_issue,
          add_issue_comment,
          list_issue_comments,
          update_issue_comment,
          delete_issue_comment,
          add_issue_labels,
          remove_issue_label,
      ]
      
      register_tools(mcp, issue_tools)
      logger.debug(f"Registered {len(issue_tools)} issue tools")

• src/pygithub_mcp_server/operations/issues.py:310-331 (helper)

  Core implementation logic using PyGithub to update the issue comment and convert the response.

  def update_issue_comment(params: UpdateIssueCommentParams) -> Dict[str, Any]:
      """Update an issue comment.
  
      Args:
          params: Validated parameters for updating a comment
  
      Returns:
          Updated comment details from GitHub API
  
      Raises:
          GitHubError: If the API request fails
      """
      try:
          client = GitHubClient.get_instance()
          repository = client.get_repo(f"{params.owner}/{params.repo}")
          issue = repository.get_issue(params.issue_number)
          comment = issue.get_comment(params.comment_id)
          comment.edit(params.body)
          return convert_issue_comment(comment)
      except GithubException as e:
          raise GitHubClient.get_instance()._handle_github_exception(e)