Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full burden but offers minimal behavioral context. It states it 'List all available design styles with basic information', which implies a read-only, non-destructive operation, but doesn't disclose potential limitations like pagination, rate limits, authentication needs, or what 'basic information' entails. This leaves significant gaps for a 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.