Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral burden, and it falls short. 'Remove' implies a destructive mutation, but the description never states whether it is permanent, whether it requires permissions, or what happens if the id/email doesn't exist or matches nothing.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.