How to get key states when 'Test if Hit by Click' triggered on Scriptable Tools?

I’m trying to make tools for level design using Scriptable Tools on 5.3.2. I want to get key states of Shift, Ctrl and Alt when those keys are down. I thought I could get them on event ‘Test if Hit by Click’, but any bool params are always false. Does anyone know how to get the states correctly?

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