Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the burden of behavioral disclosure. It states that the tool selects highest or lowest rows and that ordering is based on a numeric column, which is the core behavior. It does not detail edge cases such as null values, non-numeric columns, tie handling, or whether full rows are returned, but the primary behavior is transparent.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.