How does the AI voice agent prompt generator work?

Pick the vertical your agent serves — dental, HVAC, real estate, and so on — choose whether the call is inbound or outbound, then drop in the business name, the agent name, and the tone you want. The generator assembles a complete system prompt with seven sections: identity, objective, greeting, qualifying questions, knowledge boundaries, handoff triggers, and a structured post-call summary. The qualifying questions and escalation triggers are specific to the vertical you picked, not generic filler. Everything runs in your browser, so nothing is sent to a server. Copy the prompt straight into Retell, VAPI, Hermes, or any voice platform and adjust the details to match your client before you go live.

What makes a good voice agent prompt different from a chatbot prompt?

Voice is real time and unforgiving. A caller will not re-read a long paragraph, so the prompt has to force short replies, one question at a time, and natural turn-taking. A good voice prompt also defines explicit handoff triggers, because a confused agent on the phone burns trust faster than a confused chat window. It specifies a greeting that confirms the business name in the first sentence, knowledge boundaries that stop the agent from inventing prices or availability, and a post-call summary the CRM can parse. This generator bakes all of that in. The output is opinionated toward phone calls, not adapted from a text template, which is why the structure differs from what you would write for a website chatbot.

Can I use the generated prompt with Retell, VAPI, or Bland?

Yes. The output is a plain-text system prompt with no platform-specific syntax, so it pastes cleanly into Retell, VAPI, Bland, Synthflow, or Hermes. On most platforms you drop it into the agent's system prompt or persona field. A few notes: if your platform uses separate fields for the greeting and the system instructions, copy the greeting line into the greeting field and leave the rest in the system prompt. If your platform supports a post-call analysis schema, the summary section maps directly to extraction fields. The prompt assumes the agent can transfer calls and access a knowledge base — if yours cannot, delete the handoff and knowledge-boundary lines that reference those capabilities before you publish.

Why does the prompt include handoff triggers and post-call summaries?

Two reasons, and both are about not losing money. Handoff triggers are the difference between an agent that books appointments and one that traps an angry caller in a loop. By naming the exact moments to transfer — a billing dispute, a request for a human, an emergency, repeated confusion — you cap the downside of automation. The post-call summary is what turns a phone call into a CRM record. Without a structured summary, your client gets a pile of audio files nobody listens to. With one, every call produces a caller name, a reason, a booked time or a clear reason it did not book, and a sentiment read. That structure is what makes a voice agent feel like staff instead of a gimmick.

How should I customize the prompt after generating it?

Treat the output as a strong first draft, not a finished product. The three things to edit before going live: real business hours and location, real service names and any pricing your client wants quoted out loud, and the exact transfer number or department for handoffs. After that, run ten test calls and listen for places where the agent over-talks or answers something it should have deferred. Tighten the knowledge boundaries to match what is actually in your knowledge base. If the agent sounds robotic, soften the tone line and add one or two example phrases in the client's real voice. The vertical-specific scaffolding saves you the first hour of work; the last mile is always the client's specifics.

Is this prompt generator really free, and do you store my inputs?

It is free with no signup and no email gate. The generator runs entirely client-side in your browser, so your business names, agent names, and tone choices are never sent to a Hermes server. When you change an input, those values are encoded into the page URL so you can copy a shareable link and a teammate sees the same prompt — but that link lives only in your clipboard and wherever you paste it. We built this because most operators waste their first week rewriting the same prompt skeleton for every client. If the tool saves you that week and you later want a platform that runs the agent under your own brand from $149 a month, Hermes is here. No catch on the tool itself.

free tool

AI Voice Agent Prompt Generator

Pick a vertical and a call type. Get a production-grade voice agent prompt — greeting, qualifying questions, handoff triggers, and a post-call summary — ready to paste into any platform.

/ vertical

/ call type

/ business name/ agent name/ tone

/ generated prompt

# IDENTITY
You are Ava, a voice assistant answering the phone for Bright Smile Dental, a dental practice. You are speaking out loud on a live call, so keep every reply to one or two short sentences. Ask one question at a time and let the caller finish before you respond. Never read a list out loud — ask, then listen.

# TONE
Professional, calm, and reassuring. Clear and courteous without being chatty.

# OBJECTIVE
This is an INBOUND call. Greet the caller, find out why they're calling, answer what you can, and book a appointment or route them to the right person. Bright Smile Dental offers cleanings, exams, fillings, crowns, whitening, and emergency dental care.

# GREETING
Open with: "Thank you for calling Bright Smile Dental, this is Ava. How may I help you today?"
Confirm the business name in your first sentence so the caller knows they reached the right place.

# QUALIFY
Before you book or transfer, naturally work in these questions — one at a time, only what's relevant:
- Are you a new patient or an existing patient?
- Is this a routine visit or are you in pain right now?
- Do you have dental insurance you'd like us to check?

# KNOWLEDGE BOUNDARIES
- Only answer questions about Bright Smile Dental: services, hours, location, and booking.
- Never invent availability, prices, or policies. If you don't know, say you'll have a team member confirm and follow up.
- Do not give medical, legal, or financial advice.
- If the caller asks something outside your scope, take a message and set the expectation that someone will call back.

# HANDOFF / ESCALATION
Transfer to a human (or take a detailed message if no one is available) immediately when:
- the caller asks to speak to a person
- the caller describes severe pain, swelling, bleeding, or trauma
- the caller asks for a specific dentist or clinical question you can't answer
- the caller is disputing a bill or insurance claim
- the caller is upset and you've tried once to help
When you transfer, tell the caller what's happening: "Let me get the right person for you — one moment."

# POST-CALL SUMMARY
At the end of every call, output a structured summary for the CRM:
- Caller name:
- Callback number:
- Reason for call:
- appointment booked (date / time) OR reason not booked:
- Caller sentiment (positive / neutral / negative):
- Follow-up needed (yes / no + what):

# GUARDRAILS
- Stay on one call goal. Don't upsell unless the caller opens the door.
- If the line is silent for a few seconds, check in: "Are you still there?"
- If you mishear, confirm rather than guess, especially names, numbers, and dates.
- End the call by repeating any booked time and thanking the caller by name.

Your inputs are encoded in the URL — send it to a teammate and they see the same prompt.

how it works

The seven sections every voice prompt needs.

Most operators write their first voice agent prompt as one long paragraph of wishes — "be friendly, book appointments, answer questions" — and then wonder why the agent rambles, invents prices, and traps callers who just want a human. A prompt that works on the phone is structured, not poetic. This generator builds it from seven parts.

Identity tells the model who it is and forces short replies, because a voice caller will not sit through a monologue. Objective states the one outcome that matters on this call — a booking, a transfer, a qualified lead — and it changes depending on whether the call is inbound or outbound. Greeting confirms the business name in the first sentence so the caller knows they reached the right place, with phrasing tuned to the tone you picked.

Qualifying questions are where the vertical matters. A dental practice needs to know new patient versus existing and whether it is an emergency; an HVAC company needs the system type and whether there is no heat or no cooling right now. The generator loads the questions that actually move a call forward for the vertical you selected, so you are not starting from a blank box.

Knowledge boundaries stop the agent from making things up — no invented availability, no off-the-cuff pricing, no medical, legal, or financial advice. Handoff triggers name the exact moments to transfer to a human, which is the single biggest protection against an automation horror story. And the post-call summary turns the call into a CRM record your client can act on: caller, reason, outcome, sentiment, follow-up.

The output is a first draft you can stand behind, not a finished agent. Edit in the real hours, real services, and real transfer number, run ten test calls, and tighten the boundaries to match your knowledge base. The scaffolding saves you the hour everyone wastes on the skeleton; the client's specifics are the last mile.

frequently asked

Common questions.

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AI Voice Agent Prompt Generator

The seven sections every voice prompt needs.

Common questions.

Run your agency on Hermes.

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