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. 'Archive a list' implies a mutation but doesn't specify if it's reversible, destructive, requires permissions, or has side effects (e.g., archiving cards within). This leaves critical behavioral traits unclear for a tool that likely modifies data.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.