I tried it with separate rules. The way you wrote. But no success with the HP device.
Debug log does not help either. Supposedly snmp check was successful. But it does not deliver snmpv3 data. I only get data about v2 without context.
[snmp] Success, execution time 0.1 sec | execution_time=0.120 user_time=0.090 system_time=0.020 children_user_time=0.000 children_system_time=0.000 cmk_time_snmp=0.000