Good morning Markus!
It isn’t written in the docs, but it’s worth noting that the code uses also the samba registry as per-share config backend. Changes to the registry are picked up from the next share connection, and don’t require service restarts.
See for example the API that set the share description: ns8-samba/imageroot/actions/alter-share/50alter_share at main · NethServer/ns8-samba · GitHub
Refer also to net conf setparm manpage.