Unfortunately, it is not possible to recognize this without parsing
the whole font, including all glyphs.  We could argue, however, that a
Type 1 or CFF font that lacks global blue zone information should be
handled by the auto-hinter
No hints should trigger the autohinter, yes.

Until recently, medium.com served some Utopia CFF font (I think?!) with blue zones but without hints (result: no hinting). gov.co.uk also serves some font without hints (can't determine what kind right now). Google's Caladea and Carlito fonts ship(ped?) with a hinting table stub but no hints, but that triggered the autohinter iirc.

Blue zone/hinting table detection is a first line of defence, but you have to check for hints to be sure.

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