What are AI Agents?

An AI agent is an AI that acts on your behalf instead of just answering you. Give it a goal and it plans, acts with real tools such as a browser or email, checks its results, and keeps going until the job is done. A chatbot replies once; an agent runs a loop.

What separates an AI agent from a chatbot is the loop. A chatbot produces one answer and stops; an agent takes a goal, breaks it into steps, and performs the first step with a real tool, calling an API, filling a form, running code. Then it looks at what happened, decides the next step, and repeats until the goal is met or it gets stuck. That looping is what lets an agent book travel, reconcile invoices, or research and draft a report end to end from a single instruction. It also raises the stakes compared to chat: a wrong answer wastes a moment, but a wrong action, if one happens, can compound as later steps build on it. Agents that read outside content also need protection against instructions hidden in a webpage or email that could try to hijack the loop, an attack called prompt injection. So careful deployments add guardrails: spending limits, approval steps before anything irreversible, and logs of every action taken.

A consultant versus a contractor. Ask a consultant how to renovate a bathroom and you get an excellent answer, then everything else is on you. Hire a contractor and they take the goal itself: they measure, order the tile, schedule the plumber, hit a surprise behind the drywall, adjust the plan, and come back when there is a working bathroom. You traded effort for trust, which is exactly why contracts have budgets, checkpoints, and sign-offs before the wall gets knocked down.