Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description adds concrete behavioral context by enumerating the returned data (supervisor states, paused status, failed jobs per minute), making clear it is a read-only snapshot. With no annotations, it does not explicitly state non-destructiveness or auth requirements, but the 'Get' verb implies a safe read operation. It covers the key behavior 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.