SNMP provides nonintrusive, read-only monitoring of Secure Firewall Threat Defense devices and is appropriate for collecting high-level device statistics without interrupting production traffic. An external network management system can poll supported Management Information Base objects to obtain CPU utilization, memory usage, interface statistics, Snort information, process status, high-availability state, and cluster health. SNMP traps can also report important events without requiring continuous manual access to the device. Malware reports focus on malicious files and malware events, while risk reports summarize security risks and attacks. Host reports describe discovered hosts, applications, operating systems, and vulnerabilities rather than overall device performance. Because the requirement concerns device-level statistics and minimizing operational disruption during peak season, SNMP monitoring is the most appropriate choice.
Cisco Secure Firewall SNMP monitoring

Reference: https://www.cisco.com/c/en/us/support/docs/security/amp-endpoints/214933-amp-for-endpoints-deployment-methodology.html