Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds real value beyond that by disclosing what each listed entry contains, notably the enabled dangerous operation classes, which is the kind of context an agent needs to decide which target to act on. It does not address ordering, pagination, or the odd idempotentHint=false, which holds it below a 5.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.