Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral burden, and it discloses almost nothing beyond the read-only verb "search". It does not say how many results come back, whether matching is exact or fuzzy, how an empty result is handled, or whether only o1-launched tokens on Base are searched.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.