Mnemosyne MCP

Instructions

Implementation Reference

• src/neem/mcp/tools/hocuspocus.py:506-571 (handler)

  The complete implementation of the 'rename_folder' tool, including registration decorator and handler function. It authenticates, validates inputs, verifies the folder exists, updates the folder name using a Y.js workspace transaction via HocuspocusClient, and returns the updated workspace snapshot.

  @server.tool(
      name="rename_folder",
      title="Rename Folder",
      description="Rename a folder's display label.",
  )
  async def rename_folder_tool(
      graph_id: str,
      folder_id: str,
      new_label: str,
      context: Context | None = None,
  ) -> dict:
      """Rename a folder via Y.js."""
      auth = MCPAuthContext.from_context(context)
      auth.require_auth()
  
      if not graph_id or not graph_id.strip():
          raise ValueError("graph_id is required and cannot be empty")
      if not folder_id or not folder_id.strip():
          raise ValueError("folder_id is required and cannot be empty")
      if not new_label or not new_label.strip():
          raise ValueError("new_label is required and cannot be empty")
  
      try:
          await hp_client.connect_workspace(graph_id.strip())
  
          # Verify folder exists
          channel = hp_client._workspace_channels.get(graph_id.strip())
          if channel is None:
              raise RuntimeError(f"Workspace not connected: {graph_id}")
  
          reader = WorkspaceReader(channel.doc)
          current = reader.get_folder(folder_id.strip())
  
          if not current:
              raise RuntimeError(f"Folder '{folder_id}' not found in graph '{graph_id}'")
  
          # Update folder name via Y.js
          await hp_client.transact_workspace(
              graph_id.strip(),
              lambda doc: WorkspaceWriter(doc).update_folder(
                  folder_id.strip(),
                  name=new_label.strip(),
              ),
          )
  
          snapshot = hp_client.get_workspace_snapshot(graph_id.strip())
  
          result = {
              "success": True,
              "folder_id": folder_id.strip(),
              "graph_id": graph_id.strip(),
              "new_label": new_label.strip(),
              "workspace": snapshot,
          }
          return result
  
      except Exception as e:
          logger.error(
              "Failed to rename folder",
              extra_context={
                  "graph_id": graph_id,
                  "folder_id": folder_id,
                  "error": str(e),
              },
          )
          raise RuntimeError(f"Failed to rename folder: {e}")

• src/neem/mcp/server/standalone_server.py:317-317 (registration)

  The call to register_hocuspocus_tools which registers the rename_folder tool (among others) on the MCP server instance.

  register_hocuspocus_tools(mcp_server)