Don’t do this!
It causes dom0 to parse VM volumes* for partition tables. VM volume content is fully controlled by the VM and potentially malicious.
* All running VMs’ volumes on Btrfs/XFS; not sure about LVM
This seems like a general caveat for such tools in dom0: You don’t want to use a tool that automatically scans each and every “disk” (including virtual ones representing VM volumes). Besides the security risk, it could also cause data corruption if a VM volume “disk” that is already mounted in the VM is automatically (or after one click in the wrong place) mounted in dom0 too.