Grounding AI agents so they stop inventing answers

The failure mode that kills support bots is not being unhelpful. It is being confidently wrong about your refund policy. Once a customer screenshots that, trust is gone.

Grounding solves most of it. Index your real documentation, retrieve relevant chunks per question, and require the model to answer only from those chunks with a citation. If retrieval returns nothing above the similarity threshold, the agent refuses and escalates.

Validate the output shape, not just the content. Ask for structured output and parse it with a schema validator. If parsing fails, retry once, then escalate. This single guard removes an entire category of downstream bugs.

Log every exchange with the retrieved sources attached. When someone disputes an answer you can show exactly what the agent read. That audit trail is what makes stakeholders comfortable enough to expand the rollout.