I might have had this idea before?
Some adjectives have congruence with a perceiver rather than with the NP it describes. These adjectives convey the mental effect the quality of the NP has on the perceiver.
beautiful*-masc.def womana woman who a particular man finds beautifuldeep-masc.indef river.defa river that is deep to a man
Now, we could maybe introduce a way of deriving these, so e.g. "tired" could mean both 'tired' and 'tiring (for X)', maybe simply by double marking?