Three tools with minimal definitions. 'add' and 'mul' have acceptable 50-char descriptions and proper JSON schemas (type: number, required fields). 'echo' lacks a proper schema, input is documented as {"msg":{"type":"string"}} but this is malformed JSON Schema (missing 'properties' wrapper and 'required' array). No parameter descriptions exist for any tool. Naming is generic ('add', 'mul', 'echo') and does not follow verb_noun convention. No output schemas documented. No error handling guidance. Tools appear to be demo/test fixtures rather than production-grade definitions.

• Rename tools to verb_noun convention: 'add' → 'add_integers', 'mul' → 'multiply_integers', 'echo' → 'echo_message'. This clarifies intent and aids LLM selection.
• Add parameter descriptions to all tools. E.g., for add: 'a: First integer operand (range: -2^31 to 2^31-1)', 'b: Second integer operand (range: -2^31 to 2^31-1)'.
• Fix echo schema: change from {"msg":{"type":"string"}} to {"type":"object","properties":{"msg":{"type":"string"}},"required":["msg"]}.
• Document output schemas for all tools. E.g., add returns {"type":"object","properties":{"result":{"type":"number"},"saturated":{"type":"boolean"}}}.
• Add error handling guidance. E.g., 'If inputs exceed integer bounds, result saturates to max/min value. Check the saturated flag in response.'