How can I use hostnames instead of verbose uname?

[svte]

Zabbix shows me host names as long strings (see the screenshot attached) like Windows HOSTNAME1 10.0.17763 Microsoft Windows Server 2019 Standard x64
how can I get it to show only the hostname (HOSTNAME1)? Because all the graphs on dashboards use this long hostnames it becomes quite cluttered.

[cyber]

system.uname, what you are using there, returns exactly, what you see there... better use system.hostname

[troffasky]

How are those hosts being created?

[svte]

How are those hosts being created?

with a discovery rule:

[cyber]

system.uname, what you are using there, returns exactly, what you see there... better use system.hostname