Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations provide readOnlyHint=true (safe read operation) and openWorldHint=true (no closed-world constraints). The description adds that it searches 'upcoming events,' which implies a temporal filter, but does not detail pagination, result limits, or sorting. No contradictions with annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.