Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavioral disclosure. It only states that the tool searches contracts, but omits details such as whether it returns a list, how pagination works, whether authentication is required, or how the 'query' parameter behaves (exact match, fuzzy search, etc.). The description adds no behavioral context beyond the basic action.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.