Self resonant frequency of inductor in VCO
It's not possible to generalise, as it depends on what oscillator configuration you have chosen.

Twice the SRF means the effective shunt capacitance is 25% of the total you will need at the design frequency.

Some oscillator configurations will be quite tolerant of 25% of the tank capacitance being 'inaccessible' inside the inductor. If you want to apply the sustaining feedback by splitting the tank capacitance, then that may compromise how much intrinsic capacitance you can tolerate.

I suggest you simulate your proposed oscillator, first to see whether it runs, and then to see what margin there is before it doesn't. As long as there is reasonable margin, a fairly simple first order simulation should be adequate.