Part number + question: FTS over the local index only — does not download or index PDFs. If the index matches, returns chunks; otherwise returns suggestedDocuments (prioritized PDF URLs from the vendor site). Next step: read_doc on a chosen URL, then query_doc_content. TI symlink datasheets may be missing from suggestions — use read_doc if you already have the PDF URL. See resource electronics-docs://guide/tool-usage.

Primitive: list PDF links (datasheet, TRM, app notes) for a part from the vendor site. Does not index. After lookup returns only suggestions, you can use this for a fuller link list.

Download and index a PDF by direct URL (required for TI /lit/ds/symlink/....pdf links and any PDF not found via lookup). Often works better than lookup when you already have the exact PDF link. Pass part when known. Then use query_doc_content or read_doc_page.

BM25 full-text search over indexed chunks. Each hit includes docUrl and pageNum — use them with read_doc_page for full page text. Requires PDFs indexed via read_doc (lookup alone does not index).

Return full indexed plain text for one PDF page or a page range (after query_doc_content gives you pageNum). Requires the document to already be indexed. Pass docUrl exactly as in search results (or the PDF URL used with read_doc). Use this when snippets are too short for tables or register maps.

List indexed PDF metadata from the local database (no web fetch). Returns count and documents (id, part, title, docType, url, indexedAt). Optional part filters to that part number (normalized like other tools). Omit part to list all documents for the vendor.