Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavioral disclosure. It identifies this as a read operation ('Get') and gives examples of behavior labels, but it leaves terms like 'recent' and 'activity' undefined, and does not mention any potential side effects, permissions, or data limitations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.