Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations present, the description carries the behavioral burden. It communicates that this is a read operation (get) and that the result includes Meta approval status, which is useful. However, it does not disclose authentication needs, error behavior, or response format implications.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.