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, but it offers almost nothing. It doesn't explain the side effects (e.g., status change, notification, whether it triggers a workflow), the expected format of the comment, or the reversibility. The description is too sparse to guide correct invocation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.