get_document's empty-body note sends the agent to a rendered view that is empty when no sheet is bound

For an object-only page whose class has no sheet binding, both the source read and the recommended rendered read say "Document has no content", and the rendered read's note claims the view "is produced from the document's structured data".

Expected: When the page carries objects but no sheet renders them, the note should point at query_objects document="<ref>" (and, for the rendered read, say that nothing renders because no sheet is bound) instead of promising a view that is empty.

Actual: Two consecutive notes that contradict the visible result.