Lightroom Classic MCP

Instructions

Implementation Reference

• src/lightroom_mcp_custom/server.py:425-430 (handler)

  The main MCP tool handler function for `list_develop_presets`. It delegates the data retrieval to `list_preset_descriptions` and formats the output.

  async def list_develop_presets() -> dict[str, Any]:
      """List built-in editing presets that can be applied in one call."""
      presets = list_preset_descriptions()
      return {
          "count": len(presets),
          "presets": presets,

• src/lightroom_mcp_custom/server.py:424-425 (registration)

  Registration of the `list_develop_presets` tool using the `@mcp.tool()` decorator.

  @mcp.tool()
  async def list_develop_presets() -> dict[str, Any]:

• src/lightroom_mcp_custom/workflows.py:399-410 (helper)

  Helper function that constructs the list of preset descriptions by accessing `DEVELOP_PRESETS` and `PRESET_DESCRIPTIONS`.

  def list_preset_descriptions() -> list[dict[str, Any]]:
      out: list[dict[str, Any]] = []
      for name in sorted(DEVELOP_PRESETS):
          out.append(
              {
                  "preset": name,
                  "description": PRESET_DESCRIPTIONS.get(name),
                  "parameter_count": len(DEVELOP_PRESETS[name]),
                  "parameters": sorted(DEVELOP_PRESETS[name]),
              }
          )
      return out