You need target skew, clock buffer list, max trans constraint for sinks , max trans constraint for buffers & max Cap too.
You have some target for insertion delay, then give that too, otherwise in first pass let the tool build clock tree.
Then for better optimization you need
custom ignore pin list, leaf pin group & through pins ..
For achieving better skew cross corner you need maxdistance & max fanout constraint plus multi corner libs ..
If tool can build clock tree considering derates, then you need those too ..