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 'Get all unique tables' but doesn't cover aspects like whether this is a read-only operation, potential rate limits, authentication needs, or what 'unique' entails (e.g., deduplication). This leaves significant gaps for a tool that likely queries data.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.