Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden and it does disclose real mechanics: what each tier means (embedding present, embedding=NULL, content moved to memoria_historica) and that automatica/semantica/critico/enlazadas items are exempt. Missing are the consequences of actually executing tiering — reversibility, scope of changes per run, or the restoration path (e.g., via restaurar_historica) — which matters for a mutating tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.