i've found a couple of references about agent-less devices:
7.4.1 - newinthisrelease.pdf
Extended objects can now provide information about agent-less devices, such as routers,
switches, and storage area networks.
7.4.x - hotfixes
Ticket 25134 - auto-discovered devices are created with incorrect default ACLs.
but haven't found anything in the manual
what's this all about?
Ticket #25134 is related to bare metal provisioning with Provisioning Manager which gives you the ability to auto-discover devices based on their MAC address. Apparently the default ACLs getting set on these devices were incorrect.