MakeDir is a dos-command, which you call from Ambient - nothing to do with Ambient itself. But there no such commands for snapshot and unsnapshot (or I have'nt found them till yet in C: or MosSys:c.
I'm no progger - so maybe anyone else here is able to write such dos-commands, including toggle-feature.

Neverthelss: Arexxcommands can also be called the same way you did with makedir. Toggle-feature.....? May be can done in AREXX - don't know.