I can certainly appreciate this is cryptic - we will be adding a simple way to view the installed system versions in due course.
It will run scripts at initialisation, and when machines go up or down.
Often, this solves the problem (even My Oracle Support Note 1418873.1 says so!
): After restarting the agent, re-check the target status in OEM.
But, the v Sphere Client Summary tab for the running VM indicates: "VMware Tools: Not Installed" And it has consistently been displayed that way except for about 1/2 hour of testing during which the status was displayed as "Unmanaged" while the RPC loop was running, and "Not Running" when vmtoolsd was killed.
The "Not Installed" status has returned, but that got me digging a little bit.