The server defines 4 tools with clear action verbs and reasonable descriptions. All tools have explicit input schemas with typed properties and descriptions. However, several quality gaps prevent a higher score: (1) descriptions lack detail about error conditions and dependencies, (2) output schemas are not formally documented, (3) no pagination support despite query tools returning lists, (4) parameter constraints (e.g., limit ranges) are not enforced in schemas, (5) no per-parameter type validation hints beyond basic JSON Schema. The codebase shows competent MongoDB integration but lacks production-grade tool polish. Tool names follow verb_noun convention well (find_movies, count_movies, get_top_movies, get_movie_details), which is +10pts. Descriptions average ~150 chars, within the 10-1024 target but lack dependency hints and error guidance. All 4 tools have schemas with properties and descriptions, but output structure is only implicit in the docstring, not formally declared.

• Add formal output schema to each tool. Example for find_movies: 'Returns: Array of objects with fields {title: string, year: integer, genres: [string], cast: [string], imdb.rating: number, plot: string}'. Document via tool annotation or separate schema registry.
• Add pagination support: introduce 'offset' (default 0) and 'limit' (default 10, max 100) parameters to find_movies and get_top_movies. Document in descriptions: 'Results are paginated. Use offset to retrieve additional batches.'
• Add JSON Schema constraints: set 'minimum': 1, 'maximum': 100 for limit parameters; 'minimum': 0, 'maximum': 10 for min_rating. This prevents LLMs from passing invalid values.
• Enhance error descriptions: 'If no movies match, returns empty list. If MongoDB is unavailable, returns error message. Try a broader search (e.g., omit actor or year filter).'
• Unify identifier matching: modify get_movie_details to support regex like find_movies, or update description to note: 'Requires exact title match. For fuzzy search, use find_movies(title=...). Common case-sensitivity issues: try title without accents.'
• Add per-parameter format hints: 'genre must match MongoDB genres array (e.g., Comedy, Drama, Action)' and document valid values via enum if stable.
• Consider batch variants: add 'get_movies_bulk(titles: [string])' to fetch multiple movies in one call, reducing token waste from sequential calls.