It would be beneficial to have the ability to set threshold on the HostMonitor agent. 

According to technote TECH66525:

The HostMonitor agent will log a message in the engine log when either CPU or Swap utilization increases beyond 60% (info), 70% (warning), 80% (error) or 90% (critical). Decreases below these thresholds are not logged.  The HostMonitor agent will continue to log one message every two hours as long as the utilization stays at its current high (above 60%) value.

The HostMonitor Agent can mis-reporting CPU as busy when it is idle in an IBM/AIX Micropartition environment.