Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the behavioral disclosure burden. It clearly states the action (list), the scope (all entries), and the auth context (authenticated user). For a simple read-only listing tool with no parameters, this is sufficient transparency, though it omits details like pagination or whether past/future entries are included.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.