Three things stay with the human, and it is worth naming them explicitly at design time so they do not become a dispute during the first difficult bid.
First: price. Not because a model cannot compute it, but because price in B2B is a decision about margin, relationship and how badly you want this customer. The agent can prepare a baseline calculation and show where you sit relative to comparable completed jobs – the decision belongs to the salesperson or the sales director.
Second: commercial terms and contractual clauses. Deadlines, penalties, warranties, scope of liability. These are company obligations rather than content to be generated, and accepting them must leave a named trace in the system.
Third: the decision to bid. The agent supplies the basis – requirement completeness, compliance distribution, indicative effort – but a human judges whether it is worth it, knowing the market and the customer.
There is a fourth thing worth remembering when planning: data. Proposal teams work on price lists, margins and customer specifications often covered by confidentiality clauses. If they do not get a tool with access to company knowledge, they will paste that material into general-purpose chatbots, because the work has to get done. Deploying a controlled tool is, in this case, simultaneously an act of risk management.