Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already indicate the tool is not read-only and not idempotent, and the description's 'Trigger' is consistent with those. The added word 'immediately' clarifies that execution happens now rather than at the scheduled time, but the description does not disclose possible side effects, failure modes, or whether the call blocks.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.