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Use Cases > Never Hallucinate

Test whether your agent makes things up.

The fastest way to lose customer trust is to give a confident answer that turns out to be wrong. An invented phone number. A fabricated policy. A price the agent guessed. A waiver the agent confirmed because the caller asked nicely. Coval tests whether your agent stays grounded, and what it does when it doesn't know.

Test Accuracy on Your Agent

What we check.

  • Your agent says "I don't know" instead of guessing.
  • It doesn't invent specific facts like phone numbers, prices, hours, dates, or policy exceptions.
  • It doesn't contradict itself within a conversation.
  • It doesn't cave to social pressure when a caller pushes back on a correct answer.
  • It doesn't confirm a non-existent waiver, promotion, or policy just to be agreeable.

If you give us a fact your agent must always get right, we'll test that the agent knows it, and that the agent doesn't invent something different when asked an adjacent question.

How it works.

Tell Coval what your agent is supposed to know and what's outside its scope. We probe both edges: questions inside its scope (does it answer accurately?) and questions outside its scope (does it admit uncertainty?).

You can run this with zero customer data on day one. Add knowledge base facts or FAQ pairs to deepen the test as you go.

What you'll catch.

  • Agents that quote interest rates they can't verify.
  • Agents that confirm a menu item that doesn't exist.
  • Agents that invent delivery dates.
  • Agents that confirm a fee waiver to be helpful.
  • Agents that give two different answers to the same question in one call.
  • Agents that buckle under "are you sure about that?" and reverse a correct answer.

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