Audit answers the question what actually happened? Chat histories inside individual AI tools are not an audit trail: they are scattered, often editable and rarely show exactly which data was retrieved.
Audit trail
A reliable, chronological record of what happened: who acted, through which agent, on what resource, with what action, under which rule and with what result.
Example
The audit trail shows that on Tuesday a manager’s ChatGPT connection requested ABC Limited’s outstanding items, was allowed, then requested the internal notes and was refused under the client-confidentiality policy.