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 but offers minimal information. It mentions what the tool does but doesn't describe how it behaves—no details about data sources, timeframes, rate limits, error conditions, or what the calculation entails. For a tool with computational output, this leaves significant gaps in understanding its operational characteristics.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.