Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the behavioral burden. It discloses the core behavior: returning highest/lowest rows by numeric column and supporting ascending order. It does not mention default limits, tie handling, null values, or the shape of the returned rows, leaving some behavior undocumented.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.