Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden and does disclose real behavioral traits: the export is logged (audit side effect) and it is non-destructive to recordings and deleted content. It omits permission requirements, whether the export is synchronous, and any size/rate constraints, but the side-effect and negative-guarantee disclosure is meaningful.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.