Tool use / function calling — giving an LLM hands #Shorts

An LLM can't actually multiply huge numbers, or check today's date — so how do agents pull it off?

On its own, a model only predicts text; it can't run code or hit an API. So instead of guessing, it writes a structured call — a function name with arguments. A real tool runs it, and the answer flows back into the chat. That's function calling: it gives a language model hands — a calculator, a search engine, your database.

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