This server has critical gaps in definition quality. All 9 tools lack parameter descriptions, a hard requirement per the rubric. Tool descriptions are extremely terse (6-20 chars), violating the 10-1024 char guideline and failing to explain WHEN to use each tool or WHAT it returns. No output schemas are documented. Parameter naming is inconsistent (user_id vs channel_id_or_slug). The server exposes API key handling via _apiKey parameter, violating secret injection patterns. Error messages are generic ('Vimeo: 401'). No pagination guidance despite tools accepting page/per_page params. Naming lacks action verbs, 'video' should be 'get_video', 'videos_search' should be 'search_videos'.

• Add 50-150 character descriptions to every tool explaining WHAT it does, WHEN to use it (vs similar tools), and WHAT it returns. E.g., 'Get metadata for a single Vimeo video by ID. Returns title, duration, description, thumbnail URL, and view count. Use this after search_videos to fetch full details.'
• Add descriptions to all parameters in inputSchema. E.g., 'id': {'type': 'string', 'description': 'Vimeo video ID (numeric string, e.g. "76979871")'}, 'query': {'type': 'string', 'description': 'Search term (e.g. "nature", "tutorial"). Searches video titles and descriptions.'}
• Document output schemas for each tool. Add a 'returns' field or comment block showing the structure: e.g., 'Returns: {id, name, description, link, duration, created_time, modified_time, pictures[]}'. Include pagination info for list tools (total, page, per_page, paging.next).
• Remove _apiKey parameter override. Use only environment variable PLATFORM_VIMEO_KEY for API key injection. If dynamic key injection is needed, use a separate server configuration mechanism, not tool parameters.
• Rename tools to verb-first convention: video→get_video, videos_search→search_videos, user→get_user, user_videos→list_user_videos, channel→get_channel, channel_videos→list_channel_videos, categories→list_categories, category→get_category, category_videos→list_category_videos.