Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations indicate destructiveHint=true and idempotentHint=true, so the agent knows it is destructive and idempotent. However, the description adds no behavioral context beyond this—it does not mention that the action is permanent, what happens to the contact's progress, or any additional effects. Since annotations already provide the safety profile, a score of 2 reflects that the description contributes nothing extra.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.