Pairs you with the user's Frapea browser tab. TWO WAYS ROUND. (1) If they already have Frapea open: ask them for the pairing code (the Connect MCP button) and call this with it. (2) If they do not, or you are not sure: call this with NO arguments and you get back a link — send them the link, then call this again with the code it contains every few seconds until it returns a token (they have to accept it in their browser first). Either way you end up with a session token to pass on every later call. Codes are single-use and expire in ten minutes; a token lasts until the user disconnects.