Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavioral disclosure. The word "delete" signals a destructive mutation, but it does not state consequences, reversibility, permission requirements, or effects on related entities. This is minimally transparent but significantly under-discloses.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.