Hi,
AFAIK there is no ready solution to this. The criticality of certain events happening in VxFS/VCS/VxVM is probably too customer-specific to be reasonably shrink-wrapped.
What I see most often is a log file adapter that checks /var/adm/messages and /var/VRTSvcs/log/engine_A.log for relevant messages. Unfortunately, there does not seem to be a complete list of relevant messages available, but you could start by searching /var/adm/messages for all llt/gab/vxvm/vxfs-messages first, then masking out those that appear irrelevant to you.
In the VCS log, you would be most interested in stuff like "...agent is calling clean...", which points to something that went wrong (a resource became offline unexpectedly).