Single tool with adequate schema and description, but missing critical patterns. The 'example_tool' has a proper JSON Schema with typed properties and description. However, the tool lacks error handling guidance, output schema documentation, and composition patterns. The naming is generic ('example_tool') rather than action-verb-based (get_, create_, update_). Description is minimal (52 chars) and lacks context on when to use it or what to expect from the output. No parameters are documented beyond the schema type system. The tool is READ_ONLY but this isn't reflected in naming or recovery guidance. Overall definition quality is mediocre, functional but not production-ready.

• Rename 'example_tool' to 'echo_message' to follow action-verb naming convention and clarify intent for LLM tool selection.
• Expand tool description to 100+ characters. Add: what the tool does (echoes a message), when to use it (testing or simple text transformation), and what format it returns (a string prefixed with 'Echo: ').
• Document the output schema explicitly in the description or return type comment: 'Returns a ToolResponseContent with a single Text field containing the echoed message prefixed with "Echo: ".'
• Add error handling with recovery guidance. Instead of 'No message provided', return an error response with 'is_error: true' and message like: 'Missing required parameter "message". Provide a non-empty string to echo.'
• Enhance parameter description for 'message': 'A non-empty string to echo back (max 1000 chars). Used for testing or simple message transformation.'
• Add validation: reject empty strings and strings over a reasonable limit. Return clear error messages: 'Message must be 1-1000 characters; got {len(message)} chars.'
• If this tool is production code (not just an example), remove the 'example_' prefix and move it to a separate test/demo directory.

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

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