Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It discloses the verification step ('verify it appears in the reminder store'), which is a useful behavioral detail. However, it does not mention error handling, success/failure signals, or side effects like whether setting a new reminder overwrites an existing one. Given the absence of annotations, more behavioral context would be expected, but the verification detail saves it from being lower.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.