Single tool with clear verb-based naming and explicit schema. Description is adequate but brief (86 chars, below the p10 baseline of 34-392). Parameter 'date' has type and description. Output schema is implicitly documented in WordleAPIData struct but not formally declared in the tool registration. Error handling is present but generic, errors return text strings without actionable recovery guidance. No tool annotations (readOnlyHint, destructiveHint, idempotentHint). Composite score reflects: strong naming and schema structure (+), weak output documentation and error messaging (-).

• Add output schema documentation to the tool. Define fields returned: id (int), solution (string), print_date (string), days_since_launch (int), editor (string). Example: mcp.WithOutputSchema(...) or equivalent mcp-go API.
• Enhance error responses with recovery hints. Instead of 'failed to fetch wordle solution: status 404', return structured error: '{error: "Date not found", retryable: false, hint: "Valid dates range from 2021-05-19 to 23 days in the future. Check the date format is YYYY-MM-DD."}' or similar.
• Add readOnlyHint: true to tool definition to signal LLM and clients this is a safe, non-mutating operation: mcp.WithReadOnlyHint(true) or equivalent.
• Expand description to 150-200 chars. Include: what data is retrieved (daily Wordle puzzle), when to call it (when user asks for a specific Wordle), what is returned (puzzle solution, editor, date). Example: 'Retrieves the Wordle puzzle solution for a given date (2021-05-19 to 23 days future). Returns the puzzle word, editor, and metadata. Use to answer historical Wordle questions.'
• Document date range constraint in parameter description. Replace 'The date to be passed on to the Wordle API (YYYY-MM-DD format)' with 'Date in YYYY-MM-DD format. Must be between 2021-05-19 (launch date) and 23 days in the future. Invalid dates return a not-found error.'