Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations indicate this is a mutating operation (readOnlyHint=false), but the description adds no behavioral detail: no mention of duplicate handling, idempotency, album existence requirements, or side effects. The phrase 'messages/photos' is vague about what types of items can be added.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.