Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare destructiveHint=true and idempotentHint=true, so the safety profile is covered structurally. The word 'soft-delete' is the one piece of added value — it tells the agent data is retained rather than purged — but the description never says whether the poll can be restored, whether it disappears from read_polls, or what happens to attached questions/results.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.