Personally I'd have the agent use my own registered evisa account to submit the application. It's a 5 year visa and you should have direct access to the e-visa file/approval/status from the MFA website for the length of time it's active.
Typically direct family member or employers. I wouldn't mention that the employer is a friend. How long have you been contracted to the business? It depends on the embassy you're using. I'd seek clarification from them first.