Solid foundation with complete schemas and descriptions for all 11 tools. All tools use proper verb_noun naming (search_*, get_*, list_*, track_*). Zod schemas are well-defined with type constraints (enums, min/max bounds). However, parameter descriptions are sparse or missing for many tools (search_collections, search_users, list_photos lack per-param descriptions). Output schemas are not documented, LLMs cannot predict response structure. Error handling returns raw API errors without recovery guidance. No tool annotations (readOnlyHint/destructiveHint) despite clear read/write distinction. Average tool description ~100 chars, below the 194-char baseline for A+ tools.

• Add per-parameter descriptions to all tools. For 'page' and 'per_page', clarify: 'Page number (1-indexed, default 1)' and 'Results per page (1-30, default 10)'. For 'query', explain: 'Search terms; minimum 1 character.'
• Document output schemas in tool descriptions. E.g., 'Returns an array of photo objects with fields: id, slug, created_at, width, height, urls (raw, full, regular, small, thumb), user (id, username, name), likes, downloads.' This enables LLMs to chain tools correctly.
• Enhance error messages with recovery guidance. E.g., 'Invalid query: must be 1+ characters. Try search_photos(query="landscape") or get_random_photo() for unfiltered results.'
• Add tool annotations: mark track_photo_download with destructiveHint=true (or idempotentHint=true if the API is idempotent). Mark all read tools with readOnlyHint=true.
• Expand tool descriptions to 100-200 chars. Add context on when to use each tool: 'Use search_photos for keyword-based discovery. Use get_random_photo for serendipitous results. Use list_photos for the editorial feed.'