Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, so the safety profile is covered externally, but the description adds essentially no behavioral context of its own: no default result size or pagination behavior (despite a limit parameter), no indication of how dismissed/deleted alerts are treated by default, and no sense of result volume. The claim 'all alerts' sits slightly awkwardly with an available limit filter.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.