Update the README to indicate when tooltool should (or shouldn't) be used #617
Description
Capture some of the discussion on https://bugzilla.mozilla.org/show_bug.cgi?id=1743179 to guide future tooltool travellers.
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Capture some of the discussion on https://bugzilla.mozilla.org/show_bug.cgi?id=1743179 to guide future tooltool travellers.