Every voice agent in production runs into callers who tell jokes, make small talk, probe its identity, ask the weather, ask for opinions, or try to manipulate it into breaking character. How the agent responds is a brand signal and a security signal. Coval tests whether your agent stays in its lane without being cold about it.
Get StartedWe score each transcript against the off-topic rules for your context.
We probe the full range, from edge cases to red team: innocent confusion (wrong number), curiosity (are you a robot?), adversarial pressure (callers pushing for opinions they shouldn't get), and red-team attacks (prompt injection, jailbreak attempts, instruction overrides).
Tell Coval what your agent does and what’s in scope.
We generate off-topic scenarios calibrated to the patterns your agent will actually encounter, run them as calls, and score whether the redirect was both effective and graceful.
Make sure your agent confirms who it’s talking to before it shares information or takes action.
Learn more →Test how your agent gathers the details it needs without missing a field or asking twice.
Learn more →Catch errors before they become refunds, wrong transfers, or actions taken on bad data.
Learn more →Test the moments your agent should smoothly hand off and when it shouldn’t.
Learn more →See how your agent holds up under pressure, interruptions, slow talkers, and angry callers.
Learn more →Test whether your agent makes things up when it doesn’t know the answer.
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