It contains Docker Container Stats to monitor all running containers / addons.
During long-term usage I noticed that the addon fills up all available memory when getting the data for a week. Especially on a Raspberry Pi with Home Assistant this means death in a few minutes. Use this addon on your own risk!
Since the addon accesses the docker api, the security rating is this low. Unfortunately there is now way to access the docker api without disabling the Protection Mode of the addon. Technically with disabling it, the addon can access and control other addons and the core on a HA supervised system. But without it we can not retrieve the statistics of the running container and this addon don't work at all.