Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full burden for behavioral disclosure. 'Remove' implies a destructive mutation, but the description doesn't specify whether this requires admin permissions, whether removal is reversible, what happens to the member's content/access, or any rate limits. For a destructive operation with zero annotation coverage, this leaves significant behavioral gaps.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.