It's far more than your basic info. If you get their launcher on your PC they'll be able to siphon away any data they want at any time. Sure Valve could do that too theoretically but Valve isn't protected by the chinese government. They would get crushed with legal issues.
Give some evidence of the tool being malicious before you go spouting such things and putting out rumours purely because you're upset that a new online store doesn't have feature parity with Steam. Pathetic conduct.