I wouldn't mess with the guest managed tools on the VCSA as this might not be a supported configuration. Up until recently on Red Hat Enterprise Linux we didn't use the guest managed but installed the normal VMtools as the guest managed tools didn't work with vRealize Automation as we needed. I tried on my sandbox 6.7 VCSA and the follow commands start and then stop the guest managed service 'systemctl start vmtoolsd', 'systemctl stop vmtoolsd'. To see that it is running 'systemctl | grep vmtools'
root@tempvc [ ~ ]# systemctl | grep vmtools
vmtoolsd.service loaded active running Service for virtual machines hosted on VMware
Disclaimer: As with anything else please test before running in a production environment.