Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of disclosing behavior, side effects, and expectations. It only adds the word 'EXPERIMENTAL!' and the generic verb 'Search', which vaguely implies a read operation but does not state whether it mutates state, requires authentication, returns summaries or full documents, or has pagination/limits.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.