Auto-discovery feature enables to assign template to host as a result of the "Zabbix agent" besed (tcp/10050) periodic network scan.
Would be nice to have an auto-discovery (post-discovery) rule type that will perform Zabbix agent item value check or SNMP OID check for already registered hosts, i.e. provides periodic dynamic discovery of "features" supported at monitored hosts with the option to link/unlink templates and regrouping of hosts through follow-up discovery actions. That all without the need of network scan of the entire IP subnet.

Usage scenarios:
1) Host feature discovery for auto-registered agents.
2) Periodic host feature discovery.

Would be nice to have an option to limit the post-discovery to a specific host group, host, or hosts that are assigned a specific template.