GitLab MCP Code Review

Instructions

Approve a merge request.

Args:
    project_id: The GitLab project ID or URL-encoded path
    merge_request_iid: The merge request IID (project-specific ID)
    approvals_required: Optional number of required approvals to set
Returns:
    Dict containing the approval information

Implementation Reference

• server.py:479-500 (handler)

  The core handler function for the 'approve_merge_request' tool. It approves the specified merge request using the GitLab API and optionally updates the number of required approvals. The @mcp.tool() decorator registers it as an MCP tool, including automatic schema generation from the signature and docstring.

  @mcp.tool()
  def approve_merge_request(ctx: Context, project_id: str, merge_request_iid: str, approvals_required: Optional[int] = None) -> Dict[str, Any]:
      """
      Approve a merge request.
      
      Args:
          project_id: The GitLab project ID or URL-encoded path
          merge_request_iid: The merge request IID (project-specific ID)
          approvals_required: Optional number of required approvals to set
      Returns:
          Dict containing the approval information
      """
      gl = ctx.request_context.lifespan_context
      project = gl.projects.get(project_id)
      mr = project.mergerequests.get(merge_request_iid)
      
      mr.approve()
      
      if approvals_required is not None:
          mr.approvals.post({'approvals_required': approvals_required})
          
      return mr.asdict()

• server.py:479-479 (registration)

  The @mcp.tool() decorator registers the approve_merge_request function as an MCP tool.

  @mcp.tool()