ActionPack for VMware vCenter does not provide the actions required to create such workflow as of version 5.5.8 included with vFoglight 6.5.1. We MAY address this issue in future releases. Stay tuned.  PS: Sorry for the late reply
We have an alert to tell customers VMWare tools is out of date, can someone create a workflow that would allow them to initiate the upgrade. 
Create a workflow to upgrade VMWare tools