Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description goes beyond annotations by disclosing the cloning behavior with fresh IDs and the stacking of widgets below existing ones. It also surfaces the demo-data fallback for unconnected datasources/goals/metrics, which is a non-obvious side effect. This is significant behavioral context for an operation that will modify a page.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.