This is a scaffolding/template generator, not a production MCP server itself. The template it generates contains two math tools (add, multiply) with basic but functional definitions. Both tools have clear names following verb_noun pattern, explicit descriptions, and complete input schemas with Zod validation. However, descriptions are minimal (16-18 chars), and output schemas are present in TypeScript interfaces but not formally documented in the tool definitions. Error handling is absent, no guidance on what to do if inputs are invalid. The tools are READ_ONLY, trivial examples suitable for a starter template, but lack sophistication for production use. The server uses HTTP transport via Express, includes logging support, and demonstrates reasonable code organization. Main issues: (1) tool descriptions are too brief to be LLM-optimized, (2) no documented error responses, (3) no idempotency hints or confirmation patterns, (4) output schemas defined in TypeScript but not in the MCP tool registration.

• Expand tool descriptions to 50-150 chars explaining what each tool does, when to use it, and what it returns. Example: 'add: Performs arithmetic addition on two numbers. Returns the sum. Use when combining numeric values or computing totals.'
• Add formal output schema documentation to the MCP tool definition. Either include outputSchema in the tool definition or document the response structure explicitly in the description.
• Implement input validation with actionable error messages. Example: 'Invalid input: a and b must be finite numbers. Got a=NaN, b=5. Check for undefined values or string input.'
• Add tool annotations to the MCP definition. Mark both tools with idempotentHint=true since they are pure functions with no side effects.
• Consider adding a 'compute' tool that chains multiple operations (add result to another number, multiply result, etc.) to reduce multi-step agent prompts.
• Add parameter constraints to descriptions: 'a: First number to add (must be a valid finite number)' to guide LLM input selection.
• Document edge cases: 'Numbers must be finite. Passing Infinity, -Infinity, or NaN will result in undefined behavior.' Alternatively, validate and reject these inputs with clear error messages.

Inferred effective spec: 2025-06-18+.

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