What is AI agent security?

AI agent security is the discipline of constraining what an LLM-driven agent can do to real systems. The model itself is not the boundary. The boundary is the set of tools the agent can call, the credentials those tools use, and the checks that run before a call executes. If you treat the prompt as a security control, you have no control at all.

Best practices for implementing LLM access controls and monitoring

The question engineers actually ask is where to put the check. The answer is the tool boundary, in the request path, outside the model.

A request to an agent typically flows: user input, model reasoning, tool selection, tool execution, result returned to the model. The model controls the middle steps. You control the edges.…