In agent parameter reference it's not entirely clear what HostInterface* and HostMetada* actually do and how to configure them.

May I suggest the following changes:

HostInterface, HostInterfaceItem: explain that the value used to set up either IP or DNS address in the interface of the host. Link to both Autoregistration page and Using DNS as default interface.

HostMetadata, HostMetadataItem: explain that metadata is used to distinguish between hosts beyond the hostname and possible pass some traits. Link to both Autoregistration page and Using host metadata.

Autoregistration page:

• Explain what happens if the HostInterface value changes from IP to name and vice versa. (This will also explain what means "So it is possible to update the default interface to another DNS name or update it to an IP address").
• It's not clear what listen_dns parameter means: "If HostInterface or HostInterfaceItem parameters are not configured, the listen_dns parameter is resolved from the IP address. If such resolving is configured incorrectly, it may break autoregistration because of invalid hostname."