It would be nice if the debug console had a little help page of itself, to describe the syntax to issue commands (also the nested ones), and a disclaimer that usage can be dangerous.

Maybe add a debug-console-only command like help that shows how to use nested commands and potentially other advanced tricks, and add 'for more information on using this console type XXX'.

See also:

• [Qt] RPC-Console: support nested commands and simple value queries #7783 (comment)
• wallet: RPC calls that "leak" private keys should be disabled by default #8544 (comment)
• Console command paths cannot be specified correctly with backslashes #8912 Console command paths cannot be specified correctly with backslashes