Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare destructiveHint=true, and the description adds meaningful behavioral context: slot 'live' replaces current content, slot 'idle' stores default/fallback content, requires content scope, and URL must be absolute HTTP(S). It stops short of explicitly stating irreversibility or consequences of replacement, but 'replaces' plus the destructive annotation cover the core side effect.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.