Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description itself must convey behavior; it does indicate a read-only listing action, full scope ('all labels'), and alphabetical ordering. However, it does not disclose return format, pagination behavior, or any permission requirements, so transparency is partial rather than complete.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.