Deleting a Host:

Are you sure you want to delete host <...>? This action is irreversible.

Deleting a Host and associated VM (vsphere)?

Are you sure you want to delete host <...>? This will delete the virtual machine and its disks, and is irreversible.

Right now the prompt is visually the same. Yes, there a few extra words. But a human isn't going to take the extra time to read the message. Maybe some highlighted text on "delete the virtual machine and its disks" or a confirmation checkbox. Or both.

Deleting the Host record, not an issue, but right now deleting a VM and its disks could be a bit more explicit. The difference between the messages is quite subtle.