At a quick glance, passportindex says "visa required" but doesn't give all the gritty details of what's needed in bullet form.

I checked "Swiss passport" and "Malaysia" and it has less data than passportindex.

visalist.io: "Visa is not required for a certain period, or there is freedom of movement"

https://visalist.io/malaysia/visa-requirements/switzerland

passportindex.org: "visa-free / 90 days"

https://www.passportindex.org/comparebyPassport.php?p1=ch&fl...