Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare destructiveHint=true and idempotentHint=true, but the description adds valuable behavioral context beyond them: the asset's net book value and remaining life revert to what they were without the betterment, and the required write scope is named. This is exactly the kind of side-effect disclosure that helps an agent predict consequences.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.