Initially i also thought of doing something with the VM-name. But would that really be useful? Sometimes the nodes get switched off (cheap low-priority-nodes), azure might assign a new name to the node when it comes back. Also, the names do not seem to indicate the pool the node belongs to.
Using the pool-name sounds like a better idea. I'll have to research whether the script can actually somehow get access to the name of the pool. I'll have a look at it (it might take some more time until i can implement this).