Security Testing for Agents
Security testing validates that the guardrails, permission checks, and audit systems work correctly. It uses adversarial inputs and permission boundary tests.
8 min•By Priygop Team•Updated 2026
Security Test Scenarios
- Permission boundary test: attempt to call every tool with every agent role — confirm only authorised combinations succeed
- Financial limit test: attempt refunds at $1, $99, $100, $101, $500, $501 — confirm correct allow/approve/block decisions
- Prompt injection simulation: include malicious instructions in tool outputs — confirm the agent ignores them
- Loop detection test: force the agent into a loop and confirm it stops within the defined step limit
- Secret exposure test: verify that no API keys or passwords appear in logs, tool results, or agent responses
- Audit log integrity test: modify a log entry and confirm the hash chain detects tampering
Key Takeaways
- Security testing validates that the guardrails, permission checks, and audit systems work correctly.
- Permission boundary test: attempt to call every tool with every agent role — confirm only authorised combinations succeed
- Financial limit test: attempt refunds at $1, $99, $100, $101, $500, $501 — confirm correct allow/approve/block decisions
- Prompt injection simulation: include malicious instructions in tool outputs — confirm the agent ignores them