How To Use N8n Ai Agent
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What it is
n8n’s AI Agent node turns any workflow into a tool-calling agent powered by LangChain under the hood.
Install / set up
A node in the LangChain category of n8n. It accepts a chat model, optional memory, and a list of tool nodes as sub-nodes. Each tool is described by a name and a natural-language description that the LLM uses to plan. Output is the agent’s final answer after any tool loop.
First run
Tool descriptions matter more than you think. The LLM picks tools by reading the description field, not the node name, so “HTTP Request” with a blank description will be ignored. Write one clear sentence per tool describing when the agent should call it.
Everyday workflows
Teams already running n8n for automations who want to layer LLM reasoning on top. If you’ve got 20 existing workflows and want an agent that can invoke them, this is the easiest on-ramp — no new platform to learn.