Honestly the only thing that you need is -a (and only if you made the bad choice to do agent forwarding by default). Sending your pubkey (and a signature, because the server pretends to accept your pubkey for some reason?) isn't a security risk and you're (in theory) going to be providing much more identifying information in the form of your CC...

(And as the siblings mentioned this won't work to prevent your key from being sent if you're using an agent)