Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full burden but only states it's a search operation. It doesn't disclose behavioral traits such as whether it's read-only, pagination behavior (implied by 'limit' and 'after' in schema but not described), rate limits, authentication needs, or what happens on errors. The description adds minimal value beyond the tool name.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.