To be clear, the tool you linked is not only unnecessary but also incompatible with VEX EDR Chain — it’s meant for VEXPro chain or equivalent metal chain from other manufacturers, which is quite different from the EDR high-strength chain.
More broadly, VEXPro parts are not legal for use in VRC (except in VEXU) and are generally incompatible with EDR parts - the VEXPro line is mostly meant for use by FTC and FRC teams.