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 description adds context by clarifying 'accessible sub-pages' and 'same space' scope. It doesn't disclose details about whether duplicates link to the original, naming conventions, or whether sub-pages are copied recursively with full fidelity—useful behavioral traits for a duplication tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.