Single tool 'add' has a clear verb-noun name and basic schema with typed parameters. However, the description is minimal (22 chars) and lacks context about when/why to use it. Parameters 'a' and 'b' have type definitions and brief descriptions, meeting baseline requirements. No output schema is documented. No error handling guidance. The tool is trivial (arithmetic) and does not demonstrate production-grade patterns like pagination, error recovery, or composition with other tools. This is a demo server, not a production-ready implementation.

• Expand tool description to 50-150 characters: 'Adds two numbers together and returns the sum. Use this for arithmetic calculations. Returns a text representation of the result.'
• Document the output schema explicitly: 'Returns an object with a single field: result (number), the sum of a and b.'
• Add input validation and error handling: validate that a and b are numbers; return a clear error message if not (e.g., 'Invalid input: a and b must be numbers').
• Add a second tool (e.g., 'subtract', 'multiply') to demonstrate tool composition and chaining patterns.
• Include parameter constraints in descriptions: 'a (number): First operand. Can be positive, negative, or zero.' and similarly for b.