Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description adds minimal behavioral info: it states the return type ('Object with list of selected items') but does not clarify the structure of that object (e.g., item IDs, names, or how to access the list). The readOnlyHint annotation already covers safety, so the description's contribution is limited but not contradictory.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.