This server exposes two basic arithmetic functions (add, subtract) as MCP tools. While input schemas are present with proper types and descriptions, the tool definitions lack critical production-quality attributes. Descriptions are minimal (under 50 chars), there is no output schema documentation, no error handling guidance, no parameter constraints or validation, and no tool annotations. The tools themselves are trivial (pure math operations) and do not reflect real-world MCP use cases. This appears to be a proof-of-concept or tutorial implementation rather than a production-grade server.

• Add explicit output schema: {"type": "object", "properties": {"result": {"type": "number", "description": "The arithmetic result"}}, "required": ["result"]}
• Expand descriptions to 100-150 chars: 'Add two numbers together. Returns the numeric sum. Use for basic arithmetic operations. Accepts integers and floats.'
• Add numeric constraints to parameters: 'a': {"type": "number", "description": "First number (range: -1e10 to 1e10)"}
• Include tool annotations in registration: readOnlyHint=true, idempotentHint=true (both are safe, stateless operations)
• Document error cases: 'If inputs are non-numeric or exceed range limits, returns error with guidance to validate inputs.'