Today if I want to change something device attribute from Inventory screen , I can´t. So, you have to access other screen (configuration > hosts) for changing.
Maybe, from Inventory screen would be nice allow for changing devices values.
The idea is click on device name. Then zabbix directs to "Host Profile" screen. From that screen, I´d look up information and I could alter device values clicking Change button (that button doesnt exist today). Now zabbix could redirect for "configuration of hosts" screen. Of course, only admin users could do it.

http://www.zabbix.com/forum/showthread.php?p=69114#post69114

How posted above I suggest possibility to change device attributes from Inventory screen.
Today I can only query device values.