Docker and Agent Zabbix

Hello,

I installed a Zabbix server with Docker.
I installed the agent-zabbix docker to monitor my zabbix server.

I don’t understand how a docker container could supervise my host machine knowing that Docker’s goal is to partition.

Even passing --privileged as a parameter to the docker agent zabbix, I don’t see how agent zabbix could supervise anything other than the inside of the container

I don’t see any graphics in the Zabbix web interface linked to my host (network interface, cpu, etc …).

Isn’t it better to install the agent as root by conventionally doing apt-get install zabbix-agent?

nobody have a idea ?