There is an idea that would be useful to recalculate (refresh) the HostnameItem value periodically.

For example if we use an unified approach and for all agent config files we use: HostnameItem= system.hostname[host]
And when I change name for this host (OS settings) I would want that zabbix agent will start to use this updated name immediately to get list of active checks.
I mean WITHOUT REQUIRED AGENT RESTART.