I tried this on a local zone I had, I too see similar results in live browse.
While I can not say it authoratitevly, I suspect thats the way it is ('by design') since the underlying 'layer' that is used for finding all the information doesn't seem to be providing any information about disks etc. when run in a guest/local zone.
this seems like a familiar defect...
can you run the sysinfo command (<agent install>/nativetool) on the target agent and review the output ?
what version is the agent?