Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full burden but provides minimal behavioral insight. 'Apply network changes' implies a write/mutation operation, but it doesn't disclose critical traits like whether it requires admin permissions, if it causes network downtime, what happens on failure, or if it's idempotent. The parenthetical '(reload config)' hints at reloading configuration, but this is insufficient for a mutation tool with zero annotation coverage.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.