Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the behavioral burden. It clearly indicates a read operation ('Get') and discloses the exact return contents (name and email). It does not elaborate on side effects or auth, but for a zero-parameter read tool, this is sufficient.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.