Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations declare the mutation profile (readOnlyHint=false, destructiveHint=true, idempotentHint=true, openWorldHint=true), and the description adds genuinely new context: the cross-tenant consequence of public:true (every R3 member can see and reuse the asset), the undo semantics, the cascade rule that a texture set is toggled with all its maps, and the required 'asset:share' scope. The undo note is consistent with idempotentHint rather than contradicting destructiveHint.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.