Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already indicate safe read-only behavior (readOnlyHint: true). The description adds that it returns the 'most recent reported position' for in-air flights, but does not mention behavior when flight is not airborne or no position is available. With strong annotations, the description adds moderate value.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.