Steps to reproduce:

1. Use the "Linux by Zabbix agent" template on a host, or
2. Run zabbix_agent2 -t vfs.fs.get on a host

Result:
This will appear in syslog/journalctl:

systemd[1]: some-mount-point.automount: Got automount request for /some/mount/point, triggered by 1058985 (zabbix_agent2)

Expected:
I had hoped the {$VFS.FS.FSTYPE.MATCHES} and FSNAME macros were passed to the agent, and probing then filtered out between (what I guess) is:

1. Get contents of /proc/mounts
2. Do sys calls to get info about the mounts