With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
managementDomainPruningStateOper
management Domain Pruning State Operational
1.3.6.1.4.1.9.9.46.1.2.1.1.12
Indicates whether VTP pruning is operationally enabled or disabled in this managament domain.
Back to CISCO-VTP-MIB MIB page.
IPHost Network monitor allows you to monitor managementDomainPruningStateOper on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.