🔮The Codex
Tool Use (Function Calling)
AI's ability to use external tools like web search, calculators, and APIs.
📖 Apprentice Explanation
Tool use is when AI can do more than just chat — it can search the web, run code, create images, and use other software tools to help you. This makes AI much more capable and accurate.
🧙 Archmage Notes
Function calling allows LLMs to output structured tool invocations. OpenAI's function calling, Anthropic's tool use, and open-source frameworks (LangChain, LlamaIndex) enable tool-augmented generation. Key for building AI agents and workflows.