What does this plugin do?

The description says it fixed all MLRS's on the server but doesn't give much info.

It repairs damaged MLRS vehicles on the server.
This makes it so you do not have to wait for it to automatically repair

Is this for the vehicle HP or the rocket launch cooldown rate? I'm having a problem with the vehiclebreaking and disappearing.

same it didappears and nvr comes back i have no idea whats going on with that,,cant find anything about it.

This plugin only repairs the MLRS with a command. It does not fix the issue of the MLRS disappearing.