Single tool 'getTodo' has critical definition gaps. Input schema present but parameter 'id' lacks description (null value). Tool description missing entirely, no text explaining what getTodo does, when to use it, or what it returns. Output schema undocumented; LLM cannot predict response structure. No error recovery guidance. Naming is acceptable (verb_noun pattern) but insufficient to overcome missing descriptions and schemas. Baseline: 100% of A+ tools have tool descriptions and param descriptions; this server has 0%.

• Add tool description to getTodo: 'Fetch a single todo item by ID from the todo database. Returns the todo's title, completion status, and metadata. Use this to retrieve details about a specific task.'
• Add parameter description for 'id': 'The numeric or string ID of the todo item to fetch (e.g., "1", "42"). Must be a valid ID in the system.'
• Document output schema in tool definition: specify that response contains content array with type='text' and text field containing JSON-serialized Todo object with userId, id, title, completed fields.
• Enhance error handling with recovery guidance: 'Todo not found. Verify the ID is correct or call listTodos() to discover available IDs.' instead of generic 'Failed to fetch todo' message.
• Add input validation: constrain 'id' parameter to numeric string pattern (e.g., regex '^[0-9]+$') and document in description; return actionable error if validation fails.

Inferred effective spec: <=2025-11-25.

• Relies on Logging (deprecated) - log to stderr or use OpenTelemetry