Run snapshot action scripts on Kopia server from remote Kopia client?

I created a snapshot before-action in the global policy on my Kopia server. This script checks the local disk space and errors out, if the free disk space falls below a given amount. So far so good.

Issue is, that this action seems only to be run when performing a snapshot on the Kopia server itself and remote Kopia clients either don’t trigger a run of this script or, since the path to the script is not available to the Kopia client, the action is completely disregarded on remote Kopia clients.

Anyone come up with a solution for that, other than having all remote Kopia clients to somehow connect to the Kopia server host and run that action script otherwise?