Search across registered open-access museum collections. Returns artwork records that pass source-specific rights verification (ambiguous records excluded by default). Supports an optional date-range filter for researcher queries like "Dutch genre painting 1640–1680".

Fetch a single artwork by its normalized ID (e.g. met:436533).

Render a citation for an artwork. Styles: "full" (artist, title, date, museum, license, URL), "caption" (image caption form), "short" (inline reference).

Pick one random artwork from the local cache that matches the given constraints. Useful for breaking out of repetitive search territory (e.g. surface a random Edo-period work to satisfy a no-back-to-back-European-pre-1900 pairing rule). On a cold cache with region or period constraints provided, auto-seeds via a small search_artworks call derived from those constraints before sampling — so first-time use works without manually warming the cache. Without constraints, returns a hint to run search_artworks first.

List the regions and periods present in non-expired cached records, with per-museum record counts. Helps you see which traditions are well-represented before searching, and where holdings are sparse. Returns { regions, periods } where each entry has { tag, label, coverage: { museumCode: count } }. On an empty cache, returns a hint to run search_artworks first — list_traditions is a meta-tool over what you have already collected, not a search trigger.