PKCS#11: Can C_GetMechanismInfo() return CKR_OK on a disabled mechanism?
The caller may invoke C_GetMechanismInfo for a mechanism that does not appear in the list returned by C_GetMechanisList, where the latter "... is used to obtain a list of mechanism types supported by a token".

I believe that's the reason they added the adverb possibly.

I am not sure what you refer to as "temporary disabled". To me, if the token is not in a state that allows a certain mechanism (temporarilly or permanently), C_GetMechanismInfo should return CKR_MECHANISM_INVALID or at the very least not CKR_OK.