The Anki MCP server has clearly defined tools with action-verb naming and present descriptions, but significant gaps undermine production readiness. All 7 tools are explicitly registered with names and descriptions. However, parameter documentation is sparse, most tools lack detailed parameter descriptions beyond type/default. Input schemas are visible for all tools, but descriptions for individual parameters are minimal or absent. Output schemas are not documented in the source code. The tool descriptions themselves are adequate (10-100 chars) but underdeveloped for LLM selection logic. No error handling guidance, no recovery suggestions, and no per-tool risk annotations visible in the code. The server addresses a narrow domain (Anki operations) and does not demonstrate the comprehensive patterns needed for A-grade production tools.

• Document output schemas for all tools. Add a code comment or docstring section showing the structure returned (e.g., for get-collection-overview: {decks: [...], models: [...], fields: {...}}).
• Expand parameter descriptions with format constraints and examples. For 'query' in find-notes/find-cards, link to the Anki search syntax documentation (already provided as a resource) and give concrete examples: 'Anki search query (e.g., "deck:Default", "is:due"). See anki://docs/search-syntax for full syntax.'
• Add error handling sections to tool docstrings. Document what happens if a query is invalid, a note ID is not found, or a deck does not exist. Suggest recovery actions: 'If note not found, use find-notes to search by content, then try again with the correct ID.'
• Consider splitting add-or-update-notes into create-notes and update-notes. This clarifies intent and simplifies parameter logic. LLMs will invoke the right tool without reasoning about null checks.
• Add pagination cursors or explicit 'total_count' to find-notes and find-cards responses. Document the limit parameter more explicitly: 'Maximum results per call: 20 (default) to 1000. For large result sets, use pagination.'
• Register tool annotations via FastMCP. Update tool registrations to include hints: app.tool(...)(func, annotations={'readOnly': True}) for read-only tools, and annotations={'destructive': True, 'idempotent': False} for write tools.
• Add a dependency note in add-or-update-notes description: 'To update an existing note, you must first know its ID. Use find-notes to search and get IDs, then call this tool with the id field populated.'