Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It does usefully disclose a behavioral trait beyond the name: entries are returned without their bodies, which warns the agent not to expect full content in the results. However, it says nothing about ordering, pagination, retention windows, or whether the operation is a safe read.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.