Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnly/idempotent/openWorld, so safety is covered. The description adds nothing further: it doesn't say whether this is a dry-run style preview, what dependency traversal it performs, whether it's side-effect-free by design, or how large the result can be. "Preview" is the only behavioral hint and it is left unexplained.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.