Claude API Tool Use: Building Reliable Agentic Workflows in Production

Claude's tool use (function calling) API is what separates toy chatbots from actual agents. I've built production agents with it — here's what reliable tool use looks like when the stakes are real. How tool use works You define tools as JSON schemas. Claude decides when to call them and with what arguments. Your code executes the actual function and returns the result. Claude incorporates the result and continues. import Anthropic from '@anthropic-ai/sdk'; const client = new Anth...