Lightroom Classic MCP

Instructions

Implementation Reference

• src/lightroom_mcp_custom/server.py:813-823 (handler)

  The handler implementation for the 'add_to_collection' tool, which uses the MCP decorator and calls the underlying Lightroom catalog service.

  @mcp.tool()
  async def add_to_collection(
      collection_id: int,
      local_ids: list[int] | None = None,
  ) -> dict[str, Any]:
      """Add selected photos (or specific local_ids) to a collection."""
      ids = validate_local_ids(local_ids)
      payload: dict[str, Any] = {"collection_id": collection_id}
      if ids:
          payload["local_ids"] = ids
      return await _call("catalog.add_to_collection", payload)