Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description confirms the destructive nature ('Delete') and adds context about clearing sensitive data, which complements the annotations (destructiveHint=true). However, it does not disclose potential side effects like cascade deletions or reversibility, but annotations already cover the destructiveness, so the description adds moderate value.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.