An AI agent is a computer helper that can work toward a goal by choosing steps and using tools, such as searching files or checking information. You can think of it as a helper that can do more than answer one question: it can carry out a small sequence of tasks.
For example, you might ask an agent to find a bug, run a test, and suggest a fix. It can inspect the project and report what it found.
An agent can still misunderstand or make mistakes. Important actions should have limits and be checked by a person, especially when they affect real users or data.