AI Agent Tool Calling Explained: How Agents Know Which Tool to Use

How can an AI Agent automatically use a calculator, search the web, or query a database? The tool calling mechanism is the core capability of an AI Agent, and this article explains how it works in the simplest terms possible.

💡 What You Will Learn

How can an AI Agent automatically use a calculator, search the web, or query a database? The tool calling mechanism is the core capability of an AI Agent, and this article explains how it works in the

{
  "name": "search_web",
  "description": "",
  "parameters": {
    "query": {"type": "string", "description": ""}
  }
}

{
  "name": "get_weather",
  "arguments": {"city": "", "date": "today"}
}

  ↓
 → JSON {"name": "get_weather", "arguments": {"city": ""}}
  ↓
 get_weather("") → 25-32°C2
  ↓
 → 2532

Summary