Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, idempotentHint and destructiveHint, so the safety profile is fully covered and "Read-only" in the description is largely redundant. The description does add one useful behavioral fact – that the result is a fixed enumerated set of camera views – but says nothing about return shape or ordering. Adequate against an already-strong annotation block.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.