Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral burden and delivers almost nothing: no indication of auth requirements, error behavior for a missing/invalid id, or what "stored" distinguishes (e.g. confirmed vs. prepared reports). The word "stored" is the only behavioral hint, and it is undefined.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.