Tool Definition
Domain: Tools & Function Calling
🎯 Motivation
Before an agent can use a tool, you must define it: name, description, parameters, and return type. The model uses this to decide when and how to call it.
📋 Concrete Example
Define: get_weather(city: str, unit: str=C) -> str. Description: ‘Get current weather for a city.’ The model sees this definition and knows it can check weather.
🔗 Analogy
A tool catalog in a workshop - each tool has a label: ‘Hammer - for driving nails. Input: nail + surface. Output: nail driven in.’ The catalog tells workers what each tool does and how to use it.