You'll notice
Legacy artifact actions with no new equivalent now return a tailored explanation instead of quietly failing.
When a legacy-shaped artifact call names an action that no longer maps 1:1 onto the new schema, such as whole-artifact delete, read_asset, delete_asset, read_file, or describe_type, the tool now returns a specific explanatory error instead of silently failing. For example, it explains that delete now only removes one uploaded asset by id, and that describe_type only creates a new Artifact from a type rather than reading its details.