Use this when the user wants to find, search, or browse study documents, lecture notes, summaries, or course materials on Studocu. Pass topic/keywords as query only — never put course name, course id, or institution name in query. institution is a display name only (this tool has no institution_id). Prefer numeric course_id from search-courses when you have it: it pins the course and overrules course. If both course_id and institution are sent, course_id wins; result institution is that course's university, not the name you passed. Otherwise pass course as name or code, never as a numeric id. course is optional extra if you already have course_id. Omit unknown filters. Returns matching documents with titles, course and institution info, ratings, and a link to view each on Studocu. For open-web sources outside Studocu, use search-web instead.