SR22
Air Traffic Control Developmental
Confusion
ATC Issue All Types; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter CFTT / CFIT
General None Reported / Taken
Environment - Non Weather Related; Airspace Structure; Procedure; Human Factors
I was working the D side and got a call from the approach control sector adjacent to our sector. They asked for an approval request to turn an aircraft off an airway and direct to ZZZ1. I for some reason assumed the aircraft was VFR; and therefore did not consider the MVAs in the area when approving the request. The aircraft was assigned 11;000; but checked in level at 9;000; and therefore my R side had to issue the aircraft a climb clearance to get above the MVA.
Was working the R-side at 1 [Sectors] X/Y/Z.  My D-side fielded a call from TRACON with an APREQ to send an aircraft direct to ZZZ1. I didn't hear the call from TRACON; only that he approved a guy direct to ZZZ1. The aircraft checked on climbing 8;800 to 11;000 direct to ZZZ1. Unfortunately he didn't climb quick enough to get above the MVA; which triggered a MSAW warning.Don't clear aircraft direct unless it is known exactly what the route is like and/or we can ensure the aircraft won't conflict with an MVA.
Center D-Side Controller reported they assumed an aircraft was VFR; approved a turn; causing an MVA Violation.