# How do I stop an AI agent making up product features?

**Give it one list of what your product does, with an owner on every line,
and a rule that it may only repeat lines that are current.** When a buyer asks
about something not on the list, the agent says it will check and hands over,
which is an answer rather than an invention.

Telling the agent *only say true things* in its prompt does not work, because
it has no way to know which things are true. It has your website, an old
product sheet and whatever the last call transcript said, and all three read
equally confident.

## Why it happens

An agent fills a gap with the most plausible sentence. A buyer asks *does it
integrate with X*, and *yes* is more plausible than *I don't know*, so it says
yes. Nothing about the sentence looks wrong: it is polite, on topic, and
passes any check on wording.

**The fix is the gap, not the agent.** If every capability the agent may
mention is a line somebody owns, then *not on the list* becomes a fact the
agent can act on.

## What the list needs

- **One line per thing you say**, not one per document. A datasheet goes out
  of date as a whole and nobody notices which sentence went wrong.
- **A named owner on each line.** A line nobody owns is one no agent may use.
  That turns an empty owner field from a chore into a gap somebody wants to
  fill.
- **A date it was last checked**, and how often it should be. Past that date
  the line reads as overdue and stops being usable until somebody confirms
  it.

## What the agent does with a missing or unusable line

It says it is checking, tells the buyer so, and the question goes to the
line's owner — or, where there is no line, to whoever owns that area. The
open question is written down, so it is answered rather than forgotten.
*Answering anyway* is not an option anybody can switch on.

## What this does not do

It cannot stop a model generating a sentence. It answers the agent's question
before it sends, refuses to let it cite a line that is not usable, and records
what was said either way.

</keep-agent-product-claims-up-to-date.md> covers keeping the list current.
</stop-an-ai-sdr-quoting-the-wrong-price.md> is the same problem for prices.