The current usage tracking basically just tracks how many time a command is run
See https://gitlab.wikimedia.org/repos/data-engineering/schemas-event-secondary/-/blob/89e1fc00ff8f375e2e1653ef6f919390500a5c07/jsonschema/analytics/mwcli/command_execute/current.yaml

OS and architecture information, to see how many folks in what environment make use of the CLI

• GOOS (possible values at https://go.dev/doc/install/source#environment)
• GOARCH (possible value at https://go.dev/doc/install/source#environment)

I'd love to track individual installations of the CLI somehow to.
There are some previous discussions at T293583: [mwcli] reporting on usage
Based specifically onT293583#7468020 some sort of fingerprinting might be fine / allowed.
The most useful additional metric would be figuring out how many individual people (or users accounts or devices) use the cli tool.
Some hashed combination of:

• device username (whoami)
• device name (hostname)
• processor ID
• random salt generated at fist run of the CLI tool / first metric generator

CCing @sguebo_WMF as the person that this was last talked about with