Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already indicate a write operation (readOnlyHint=false) and non-destructive behavior (destructiveHint=false). The description adds the requirement that the post be 'previously deleted,' but does not disclose details such as failure modes, permission requirements, or whether restoration is reversible.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.