Tools show in recently played games section

[Liemaeu]

Your system information

• Steam client version (build number or date): 1714778942
• Distribution (e.g. Ubuntu): openSUSE Tumbleweed
• Opted into Steam client beta?: [Yes]
• Have you checked for system updates?: [Yes]
• GPU: Nvidia RTX 3070

Please describe your issue in as much detail as possible:

Tools like Proton are listed as "recently played games" in the library overview. Besides they aren't even games, they should not be shown there. Proton doesn't even have a "play"-button, just an uninstall-button.

Steps for reproducing this issue:

1. Install a tool, e.g. Proton 9
2. Open the library overview

[kisak-valve]

Related: #10099