Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full burden for behavioral disclosure but provides minimal information. It states what the tool does but doesn't disclose important behavioral traits like whether this is a read-only or write operation, what permissions are required, whether there are query size or complexity limits, what happens with malformed queries, or what the response format will be. The description adds almost 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.