This probe checks each que on a quemanager server. This is specified by the wmqhandles file - talk with your MQ admin for assistance. It checks the capacity of the Que, and how many items are in the que. Then based on a percentage it will generate alerts, QOS, etc.
M074 - from IBM for powershell for MQ
Getting MQ and powershell to work on a server is a challenge, at least for me. You will know if you have success when you can run some of the cmdlets for WebsphereMQ.