GlossaryAgents
AI agent
An LLM-driven system that takes actions in the world, often by calling tools and APIs in a loop.
An AI agent is a system where an LLM is the planner / controller, given a set of tools (functions it can call) and a goal. The LLM decides which tool to invoke, observes the result, and decides the next step - looping until the goal is reached. Web retrieval is the single most common tool in agent stacks because almost every real task needs fresh world information.