AI Guardrail Benchmarks: Read the Test Design

A reported attack-success rate needs a system version, covered actions, attempt counts, allowed inputs and success criteria. Adaptive attempts may be related, so the rate should not be treated as a universal failure probability.

Compare results only when the scope and method support that comparison. Describe uncovered actions and untested paths. A fixed benchmark score cannot guarantee future security or an external review outcome.

Use Security Review Readiness Checklist to record gaps and owners before a scoped assessment.

Record the number of attempted scenarios, the scenarios selected, the system version and what counted as failure. Keep blocked, allowed, failed and untested paths distinguishable.

A result of two failed checks out of twenty attempts tells a reviewer about those attempts. It does not establish the probability of failure across every production interaction. A changed prompt, tool or permission can invalidate a comparison unless the review explains the difference.

Ask for reproducible scenarios and the unresolved findings behind a headline score. The sample assessment report illustrates how counts and coverage limits can be presented without a readiness prediction.