Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations declare readOnlyHint=false and openWorldHint=true, implying a mutating operation, but the description adds zero context about what state is overwritten, whether existing data is replaced or merged, or what permissions are required. For a backup-load operation this is a serious omission, though no annotation contradiction exists.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.