Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description alone must disclose behavior. It states the date is set to today, but does not mention side effects (e.g., whether the reminder must be active, whether it can be undone, or what happens to recurrence). Basic transparency but some gaps.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.