Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already flag destructiveHint=true, so the destructive nature is known. The description adds valuable behavioral context by disclosing the cascading effect on templates that referenced the layout, which is not inferable from the schema or annotations. It does not discuss reversibility or failure behavior, but the core side effect is communicated.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.