In complex environments which are in need for a tool like discovery, a Discovery administrator will most likely experience troubles with firewalls.
For testing connections from console level the only tool installed on the appliance is telnet which already helps with TCP tests.
For testing snmp connections no suitable tool is available on console level, since this requires UDP connections.
netcat and snmpwalk would aid tremendously to quickly test the availability of these connections.
Installing additional software in the appliance is unsupported, so providing the named tools within the appliance could only happen on side of BMC (e.g. with the next minor release via a patch).