Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full behavioral disclosure burden. It states the action and scope but does not disclose side effects, whether scene data is modified, whether a navigation mesh resource must be assigned beforehand, or what happens if no NavigationRegion nodes exist.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.