Single tool 'add' with critical definition gaps. Input schema present but parameters lack descriptions (null values). Tool description missing entirely. No output schema documented. Naming is generic and does not follow verb_noun pattern. This is a minimal training example, not production-ready.

• Add a tool description: 'Adds two numbers together and returns the sum. Use this when you need to perform arithmetic addition.'
• Add parameter descriptions: a='The first number to add (numeric value)', b='The second number to add (numeric value)'
• Document the output schema in code comments or a separate schema definition showing the response structure (e.g., {result: number})
• Rename tool to 'add_numbers' to follow verb_noun convention and improve LLM discoverability
• Add input validation and error handling with actionable messages (e.g., 'Both parameters must be numbers')