GCP MCP

Instructions

    List Compute Engine persistent disks in a GCP project.
    
    Args:
        project_id: The ID of the GCP project to list disks for
        zone: Optional zone to filter disks (e.g., "us-central1-a")
    
    Returns:
        List of persistent disks in the specified GCP project
    

Implementation Reference

• src/gcp_mcp/gcp_modules/compute/tools.py:343-343 (registration)

  Registers the list_disks tool using the @mcp.tool() decorator, which also derives the schema from the function signature and docstring.

  @mcp.tool()

• src/gcp_mcp/gcp_modules/compute/tools.py:344-418 (handler)

  The handler function that implements the list_disks tool. It lists persistent disks in a GCP project, optionally filtered by zone, using the Google Cloud Compute API. Formats and returns a string list of disks with details like name, type, size, status, and attachment info.

      def list_disks(project_id: str, zone: str = "") -> str:
          """
          List Compute Engine persistent disks in a GCP project.
          
          Args:
              project_id: The ID of the GCP project to list disks for
              zone: Optional zone to filter disks (e.g., "us-central1-a")
          
          Returns:
              List of persistent disks in the specified GCP project
          """
          try:
              from google.cloud import compute_v1
              
              # Initialize the Disks client
              client = compute_v1.DisksClient()
              
              disks_list = []
              
              if zone:
                  # List disks in the specified zone
                  request = compute_v1.ListDisksRequest(
                      project=project_id,
                      zone=zone
                  )
                  disks = client.list(request=request)
                  
                  for disk in disks:
                      size_gb = disk.size_gb
                      disk_type = disk.type.split('/')[-1] if disk.type else "Unknown"
                      status = disk.status
                      users = len(disk.users) if disk.users else 0
                      users_str = f"Attached to {users} instance(s)" if users > 0 else "Not attached"
                      
                      disks_list.append(f"- {disk.name} (Zone: {zone}, Type: {disk_type}, Size: {size_gb} GB, Status: {status}, {users_str})")
              else:
                  # List disks in all zones
                  zones_client = compute_v1.ZonesClient()
                  zones_request = compute_v1.ListZonesRequest(project=project_id)
                  zones = zones_client.list(request=zones_request)
                  
                  for zone_item in zones:
                      zone_name = zone_item.name
                      request = compute_v1.ListDisksRequest(
                          project=project_id,
                          zone=zone_name
                      )
                      try:
                          disks = client.list(request=request)
                          
                          for disk in disks:
                              size_gb = disk.size_gb
                              disk_type = disk.type.split('/')[-1] if disk.type else "Unknown"
                              status = disk.status
                              users = len(disk.users) if disk.users else 0
                              users_str = f"Attached to {users} instance(s)" if users > 0 else "Not attached"
                              
                              disks_list.append(f"- {disk.name} (Zone: {zone_name}, Type: {disk_type}, Size: {size_gb} GB, Status: {status}, {users_str})")
                      except Exception:
                          # Skip zones where we can't list disks
                          continue
              
              if not disks_list:
                  zone_msg = f" in zone {zone}" if zone else ""
                  return f"No persistent disks found{zone_msg} for project {project_id}."
              
              disks_str = "\n".join(disks_list)
              zone_msg = f" in zone {zone}" if zone else ""
              
              return f"""
  Persistent Disks{zone_msg} in GCP Project {project_id}:
  {disks_str}
  """
          except Exception as e:
              return f"Error listing persistent disks: {str(e)}"