Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=false, destructiveHint=false and openWorldHint=true, so the basic safety profile is covered. The description adds nothing further: it doesn't say whether adding is idempotent, whether it applies to multiple albums at once, or what happens with duplicate membership.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.