Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=false, destructiveHint=true, and openWorldHint=true, so the agent knows this mutates external state. The description adds the explicit-user-intent requirement and the 'previously verified' precondition, which is real added context. It does not, however, disclose the irreversibility of publishing to relays or failure behavior, which matters for a destructive tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.