config_set_project

Instructions

    Set the default Google Cloud project.
    
    Args:
        project_id: The ID of the project to set as default
    
    Returns:
        Status message indicating whether the project was set
    

Implementation Reference

• src/gcp_mcp/gcp_modules/auth/tools.py:249-290 (handler)

  The core handler function for the 'config_set_project' tool. Decorated with @mcp.tool() for automatic registration. Updates the global project ID, writes to gcloud config file using helper, and verifies project accessibility using GCP Resource Manager API.

  @mcp.tool()
  def config_set_project(project_id: str) -> str:
      """
      Set the default Google Cloud project.
      
      Args:
          project_id: The ID of the project to set as default
      
      Returns:
          Status message indicating whether the project was set
      """
      nonlocal _current_project_id
      
      try:
          # Update global project ID
          _current_project_id = project_id
          
          # Create or update the config file
          _set_project_id_in_config(project_id)
          
          # Verify the project exists
          try:
              from google.cloud import resourcemanager_v3
              import google.auth
              
              credentials, _ = google.auth.default()
              client = resourcemanager_v3.ProjectsClient(credentials=credentials)
              name = f"projects/{project_id}"
              
              try:
                  project = client.get_project(name=name)
                  return f"Default project set to {project_id} ({project.display_name})."
              except Exception:
                  # Project might not exist or user might not have access
                  return f"Default project set to {project_id}. Note: Could not verify if this project exists or if you have access to it."
          
          except Exception as e:
              # Don't fail if we can't verify the project
              return f"Default project set to {project_id}."
              
      except Exception as e:
          return f"Error setting project: {str(e)}"

• src/gcp_mcp/gcp_modules/auth/tools.py:374-401 (helper)

  Helper function called by the handler to persist the project ID in the standard gcloud configuration file (~/.config/gcloud/configurations/config_default).

  def _set_project_id_in_config(project_id: str) -> None:
      """Set the project ID in the configuration file."""
      config_dir = _get_config_path()
      os.makedirs(config_dir, exist_ok=True)
      
      config_file = os.path.join(config_dir, 'configurations', 'config_default')
      os.makedirs(os.path.dirname(config_file), exist_ok=True)
      
      # Read existing config if it exists
      config_data = {}
      if os.path.exists(config_file):
          try:
              with open(config_file, 'r') as f:
                  for line in f:
                      if '=' in line:
                          key, value = line.strip().split('=', 1)
                          config_data[key.strip()] = value.strip()
          except:
              pass
      
      # Update project
      config_data['project'] = project_id
      
      # Write back config
      with open(config_file, 'w') as f:
          for key, value in config_data.items():
              f.write(f"{key} = {value}\n")

• src/gcp_mcp/gcp_modules/auth/tools.py:249-249 (registration)

  The @mcp.tool() decorator registers the config_set_project function as an MCP tool within the register_tools(mcp) function.

  @mcp.tool()