This tool is written in a needlessly complicated way, seems unsupported, and is missing some pretty basic features, like dealing with single content-items. Would love to be proven wrong.
A massive quality-of-life improvement would be to add the ability to list content-items based solely on their folderID, "update" aka import content-items based solely on their unique UUID id, and export content-items based solely on their unique UUID id given an array of ids.