How do I create a descriptor wallet?
descriptors is a boolean argument, so it should either be true or false. As with all RPCs, the argument is positional by default. So your command would look like
bitcoin-cli -signet createwallet &quot;mywallet&quot; false false &quot;&quot; false true

You can specify that the arguments be named so you don't have to put the position correctly. In that case, you do
bitcoin-cli -signet -named createwallet wallet_name=&quot;mywallet&quot; descriptors=true