Strong foundational quality with excellent schema definitions, comprehensive parameter descriptions, and consistent naming conventions. All 10 tools follow verb_noun patterns and have non-trivial descriptions (100+ chars). Input schemas are formally defined via Zod with proper type constraints, enums, min/max bounds, and descriptions. However, output schemas are not explicitly documented in the source code, only the tool names and input schemas are visible. Response formatting is configurable (markdown/json) but the actual shape of returned objects is not formally documented. Error handling exists (via error reporting feature flag) but recovery guidance is not evident in the code samples provided. Tool composition is clean, each tool has a single responsibility, though some could benefit from cross-tool chaining documentation.

• Document the output schema for all 10 tools. For each tool, add a 'Response' section to the description or provide a formal JSON Schema. Example: 'Returns an object with {id: string, urls: {raw, full, regular, small, thumb}, photographer: {name, username}, width, height, created_at}'.
• Enhance error handling guidance in descriptions. Add recovery hints like: 'If photo not found, try unsplash_search_photos() to verify the ID exists.' For search tools, clarify that a 401/403 error likely means UNSPLASH_ACCESS_KEY is invalid or has insufficient permissions.
• Add tool-chaining hints to discovery tools (search_*). Example for unsplash_search_users: 'Once you have a username, call unsplash_get_user_photos() to fetch their portfolio.'
• Expand unsplash_list_photos description from 37 to ~100 chars. Clarify when to use this vs search_photos (when no query term is available, or browsing by recency/popularity).
• Clarify unsplash_download_photo semantics. State whether it's a read-only tracking call (recommended) or if it downloads binary data. If it's just tracking, rename to unsplash_track_photo_download for clarity, or explain in description: 'Records that a photo was downloaded and returns metadata, does not download binary image data.'
• Add minLength/maxLength constraints to string parameters where they make sense (e.g., username in get_user_photos, query in search tools). Already done for query in search_photos (minLength: 1, maxLength: 200), replicate pattern.
• Consider adding 'Include dependency hints' per the rubric pattern. E.g., unsplash_get_photo should note: 'To find photo IDs, use unsplash_search_photos() first if you only have keywords.'