Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already indicate a destructive operation, and the description adds useful behavioral context: the member loses access to every MCP in the account, and unaccepted invitations can be withdrawn. This goes beyond the raw annotation flags without contradicting them.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.