The Generic tool is not visible in the Tool Palette because it is not a tool you would normally use. Instead it is a tool Alteryx uses to capture as much information about the incoming tool as possible to help you to continue with the configuration of your workflow.
Note: The Unknown tool most typically will display when the workflow includes a macro tool that Alteryx cannot find. In this case, simply right click on the workflow canvas and choose Insert > Macro and then browse to the location of the macro tool.
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