snmpget and snmpwalk will simply print numeric OIDs which are hard to read and to interpret. You can provide MIBs to get human readable OIDs. For instance, let's add the Fibre Channel Management MIB (FCMGMT-MIB):
mibdirs +$HOME/.snmp mibs +FCMGMT-MIB
Of course you can specify multiple mibdirs and/or multiple mibs. snmpget/snmpwalk will complain if some mib is missing and thus can't resolve all OIDs.