Single tool 'echo' with minimal definition. Tool has a basic description ('The message to echo back.') but it is generic and does not explain WHEN to use it, WHAT it returns, or any prerequisites. Input schema is present (message: string) but lacks depth. No output schema documented. No error handling guidance. Tool naming is acceptable but the overall definition quality is far below production standards. This is a placeholder/demo tool, not a production-grade MCP server.

• Expand tool description to 50 - 150 chars explaining purpose, use case, and return format. Example: 'Echoes back the provided message unchanged. Use to test connectivity or verify message transmission. Returns the message as plain text.'
• Document the output schema explicitly. Specify that the tool returns {content: [{type: 'text', text: string}]} so LLMs know the response structure.
• Add error handling guidance. If the message is empty or exceeds a size limit, return a clear error: 'Message cannot be empty' or 'Message exceeds 10,000 characters.'
• Consider adding a second tool (e.g., 'reverse_message' or 'count_words') to demonstrate tool composition and chaining patterns.
• Add tool annotations (readOnlyHint: true) to signal that 'echo' is safe to call repeatedly without side effects.

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

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