Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. It states 'Create a configuration backup' which implies a write operation, but does not cover critical aspects such as permissions required, whether it's idempotent, rate limits, what happens if a backup already exists, or the format/scope of the backup. This leaves significant gaps for an agent to understand the tool's behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.