Single tool 'echo' has a clear, concise description (89 chars) and proper input schema with typed parameters. However, the tool is a trivial demonstration example, not production-grade. The schema is well-formed with type='object', properties defined, and required array present. No output schema is documented. The tool lacks error handling guidance, recovery patterns, and real-world utility. As a template/example server, this is intentional, the framework is sound, but the single tool does not demonstrate production patterns like pagination, structured output, or error classification.

• Document the output schema in the tool definition. Specify that echo returns {type: 'object', properties: {result: {type: 'string'}}}.
• Add a realistic example tool (e.g., fetch_weather, search_docs, create_task) to demonstrate pagination, structured output, and error handling patterns.
• Include error handling in the handler: validate message is non-empty, return actionable errors like 'Message cannot be empty' instead of silent failures.
• Expand the tool description to explain when to use echo (e.g., 'Use to verify message formatting or test tool invocation') and what it returns.
• Add per-parameter constraints: specify message length limits (e.g., 'max 1000 characters') in the description.