Single tool 'add' has a clear verb-noun name and comprehensive schema with all parameters typed and described. Input schema uses Zod with proper type definitions (integer, default values, minimum constraints). Output schema is documented with structured fields (result, operands, operation). Description is adequate (97 chars) but could be more specific about use cases. Tool is READ_ONLY and idempotent. Main gaps: no error handling guidance, no recovery hints for edge cases, and output schema is defined in code but not formally exposed in the tool registration (only inputSchema is visible in the registration call).

• Formally register the outputSchema in the registerTool() call so the MCP protocol exposes the full response structure to clients.
• Add a maximum constraint to waitSeconds (e.g., 3600 for 1 hour) to prevent runaway timeouts.
• Expand tool description to 150-200 chars: explain when to use it (e.g., 'Use this tool to perform simple arithmetic addition. Useful for testing MCP integration or as a building block in multi-step calculations.') and note that it supports optional delays.
• Add error handling documentation: describe what happens if inputs are invalid, if the computation fails, or if the wait times out. Provide recovery hints (e.g., 'If the tool times out, try reducing waitSeconds or retrying with smaller numbers.').
• Add tool annotations (readOnlyHint: true, idempotentHint: true) to the tool registration to signal to LLMs that this tool is safe to retry and has no side effects.

Inferred effective spec: 2025-06-18+.

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