Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=false, destructiveHint=false, idempotentHint=false and openWorldHint=true, so the safety profile is largely covered. The description adds one genuinely useful behavioral fact—it will not overwrite ('sin sobrescribir')—which is consistent with destructiveHint=false. It still omits what happens on error, cross-volume behavior, and permission requirements.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.