Agent capabilities expand the security boundary
An operational AI agent can retrieve documents, call APIs, maintain context, and propose or perform changes. Those capabilities create risks beyond the wording of its final answer. OWASP identifies tool abuse, sensitive information exposure, goal hijacking, and excessive autonomy among agent-specific concerns. Begin with a narrow task and an explicit set of permitted resources. A helpful conversation does not establish that the surrounding system should grant unrestricted access to administrative functions or production configuration.
Keep approval independent of model output
The execution component should verify the actor, actual tool, target, and parameters before a sensitive operation. OWASP advises binding authorization to the exact action and preventing reuse where relevant. An agent-provided flag is not sufficient evidence of approval. Changes to the proposed target or operation need appropriate renewed review. Use trusted application controls for these decisions rather than asking the same model to certify its own authority or interpret an ambiguous conversational instruction as unlimited permission.
Protect context and external inputs
Documents, tool responses, messages, and stored memory can contain misleading instructions. Treat them as untrusted inputs and restrict what they can cause the system to do. Limit sensitive information in prompts and logs. Separate users and sessions appropriately. No prompt template or filter guarantees protection by itself. The surrounding tool permissions, data boundaries, and output handling should contain the consequences of a wrong decision instead of assuming that the model will always recognize hostile content.
Test behavior after material changes
Evaluate denied tools, missing approvals, unavailable services, and bounded retry behavior through authorized testing. Record model, tool policy, and configuration versions. Include cost and execution limits so an unresolved task cannot consume resources indefinitely. Monitor meaningful events without retaining unnecessary sensitive content. A secure agent program measures whether the system respects its boundaries under difficult conditions, not merely whether it produces convincing recommendations in a prepared demonstration. Future 6G operations will need that discipline as much as current systems.