Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the burden of behavioral disclosure. It does well by stating exactly what the tool returns: inputs with units/ranges/defaults, outputs, and underlying assumptions/tables. The describe framing implies a read-only operation, though it does not explicitly state that it does not perform calculations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.