request_id from the error, also sent in the x-request-id header. For a run, include its gen_... ID if you have it: the API and the MCP tools return it with every result.
To ask for a result to be taken down, such as one that shows you without your permission, use the subject “Takedown request” and follow section 6 of the acceptable use policy. Anyone can send one, with or without a Leap account.