For security reviewers

For security reviewers.

An AI agent with money tools adds two review questions to the usual ones: does it have more authority than it needs, and how often can a user talk it into using that authority wrongly? OWASP lists both prompt injection and excessive agency among its top risks for LLM applications. Ask for least-privilege tools, limits enforced outside the model, and adversarial test results with ranges.

01What you answer for

You answer forHow an AI agent puts it at risk
Least privilegeTools that can refund, pay or read more than the task needs
Input handlingInstructions hidden in messages, invoices or pages
Data protectionRecords disclosed to an unverified person
Change controlModel or prompt changes released without re-testing

02Questions to ask your team

  1. Which tools can the agent call, with what permissions, and which does it need?
  2. Is authorisation enforced in downstream systems or left to the model?
  3. Which actions need human approval?
  4. Has it been tested with injected instructions and impostors, and how often did they work?
  5. Is every money action logged with its conversation?

03Evidence to ask for

  • A tool and permission inventory.
  • Adversarial results for injection, impersonation and data fishing, with ranges.
  • Proof that limits hold when the model is persuaded (tool-level enforcement).
  • A re-test policy tied to releases.

04Where to go next

Questions

Does this replace a security red-team?

No. A red-team looks for any way to make the system misbehave. Adversarial commercial testing measures how often the agent gives money or data away under realistic pressure. Most agents with money tools benefit from both.

See where your agent leaks money. Tested against your own rules, with the money at stake.

See the testsHow we score