The readiness test
The first sales hire fails at a high rate, and the cause is usually upstream of the hire. A founder who is tired of selling concludes that the answer is someone else to do it, and hires into a situation where the sale has not been made repeatable and where the flow of enquiries is thin. The new person spends three months building their own pipeline from nothing while being measured against a target derived from the founder best months, and leaves.
So before writing a job description, answer three questions honestly. Can you describe who buys and why, with examples? Do enquiries arrive at a rate that would keep one person busy? And can you fund the role for long enough to cover a realistic ramp? If any answer is no, the money is better spent on demand generation or on documenting what you know.