If you somehow downloaded a file from such a site, scan it immediately with Malwarebytes or VirusTotal. Do not run unknown .exe files from MediaTek hacking blogs.
The MTK Universal Tool, detailed on repcfun.com, is a Windows utility designed to bypass Factory Reset Protection (FRP), remove screen locks, and manage bootloaders on MediaTek-based Android devices. It supports various brands and offers features like wiping data and removing demo modes, but users are cautioned that the tool may be flagged as a potentially unwanted program and can cause data loss. For more details, visit repcfun.com Mediatek Universal Tool 2022 - ⋆ Stay safe
The "2021/12" in the link suggests this specific version of the tool was released in December 2021. In the fast-moving world of Android security, tools from 2021 might be considered "legacy" now, as phone manufacturers frequently patch the vulnerabilities these tools exploit. However, older tools remain vital for technicians repairing older models of phones.