Agent security is becoming a systems problem
A chatbot can give a bad answer. An agent can take a bad action. That difference changes the security model.
Once an AI system can call tools, inspect repositories, query databases, open tickets, summarize internal documents, interact with APIs, or trigger workflow automation, the boundary is no longer just the model. The boundary includes permissions, tool design, application logic, data flow, logging, authorization, and the assumptions developers made when they connected everything together.
The risk is not limited to strange model behavior; the risk is system behavior. An agent that reads untrusted content and treats it as instruction is not merely confused—it has crossed a trust boundary. An agent that leaks private context through a tool call is not just producing a bad response; it is exposing data through an action path. These are the kinds of failures teams will face as agents move from prototypes into production.