AI Guest Message Drafts: How Watchtower Reads Your Guidebook to Reply for You

If you host a vacation rental, you've answered the same questions 50 times. "What's the wifi?" "Can I check in early?" "Is parking included?" "Where do I leave the keys?" The answers don't change between guests, but typing them all out, every time, takes hours per month that you don't get back.

There are plenty of "AI for Airbnb" tools on the market, and they fall into two categories. Some auto-send replies on your behalf the second a message lands. That is fast, but guests increasingly notice the bot tone, and a wrong answer to a refund question is a five-star review you'll never get. The others require you to hand-craft a system prompt for every property, copy-pasting your wifi password and check-in instructions into a giant text blob the AI reads on every request. That's a maintenance nightmare the moment you change your wifi or your house rules.

A Different Approach: Knowledge From the Property You Already Maintain

HostMoat's Watchtower is built on a simpler premise: you already wrote the answers while setting up the property. Canonical Wi-Fi credentials, check-in and checkout times, parking, amenities, rooms, description, contacts, and house rules are maintained through Property Profile, while custom instructions and local recommendations remain in Guidebook. That structured content becomes owner-reviewed AI context without a second prompt to maintain. Update the source record, and future drafts use the current value.

When a guest asks "what time is check-in?", an owner-reviewed draft can use the property's actual standard time plus its arrival instructions. When they ask about pet policies, it can use the canonical house-rules row. If the answer is not documented in an allowed source, the AI is instructed to say it will check with you and follow up, not to guess. That is the difference between a useful drafting tool and a hallucination machine.

Inbox Drafts Are Always Reviewed

Here is the design rule for the Inbox: Watchtower never sends an inbox draft on your behalf. Every draft lands in a review panel above your reply composer with three choices: Send as-is, edit and send, or discard. Pro can prepare a draft automatically when an inquiry arrives, but a person still approves the send. The point is not to remove you from the conversation; it is to remove the typing.

This matters for two reasons. First, the model occasionally gets something subtly wrong (a date, a rate, a policy edge case), and you'll catch it during the half-second skim before sending. Second, your voice matters. Guests can tell the difference between a thoughtful host reply and a bot blast. Watchtower drafts in your tone (configured per property) and in your voice, but you still hit Send.

Built-In AI, With Legacy Key Options Preserved

Pro includes HostMoat's provider, so a new customer does not need to buy or configure a separate AI key. Existing legacy accounts keep their recorded OpenAI, Anthropic / Claude, or public HTTPS Ollama configuration.

Pro includes automatic inquiry-draft preparation with no per-message HostMoat charge, plus an optional automatic public chat widget.

In all cases, your API keys are encrypted in Supabase Vault on the server side. The Settings page only ever shows a "Configured ✓" status; the browser never sees the actual key value after you save it. To rotate, click Replace and paste a new one; the old one is overwritten in Vault.

Customize the Voice and Tone

Open Watchtower AI from the sidebar and set a Tone field with whatever voice fits your brand: "warm and casual", "professional and concise", "friendly with a Southern drawl", anything natural-language. The AI will follow it. Add Owner Notes for context the guidebook doesn't cover ("if guests ask about late checkout, offer it for $30 when we don't have a back-to-back booking"). The AI uses these as soft instructions on top of the structured guidebook facts.

For more control, the Advanced Custom Prompt textarea adds your voice and response-structure instructions without replacing Watchtower's mandatory safety rules. The {{message}} and {{knowledge_base}} placeholders refer to clearly delimited, untrusted content blocks; if you omit them, Watchtower still supplies the facts and guest message safely.

Test Before You Ship

The Watchtower AI page has two panels that demystify what the AI is doing. "What Watchtower Knows" shows the knowledge sources used for owner-reviewed inbox drafts: canonical Property Profile facts, booking-site presentation, visible guidebook sections, and relevant calendar context. Each item links to the source page so you can fix gaps without maintaining a duplicate AI-only copy. "Try a sample question" lets you type a hypothetical guest message and see the response without sending anything, useful for confirming tone or comparing providers before going live.

Public Chat Is a Separate Pro Feature

Unlike Inbox drafts, the optional Pro public chat widget answers pre-booking visitors automatically and identifies itself as AI-powered. It uses a stricter allowlist: exact address, Wi-Fi, entry/lockbox codes, private contacts, parking/access instructions, and freeform guidebook fields are excluded. Hosts still review the public property description, listing facts, amenities, and house rules they choose to share. Known booked ranges are context only; visitors are directed to the live booking calendar for authoritative dates and quotes.

When Not To Use AI Drafts

Watchtower is a drafting tool, not a substitute for your judgment. If a guest is upset, asking for a refund, or in the middle of a complicated multi-message exchange, type the reply yourself; the situational nuance matters more than speed. The same goes for first-time guests asking detailed questions about availability or pricing edge cases; these are conversations where your voice and flexibility convert bookings, and a draft can flatten the relationship.

The right use case is the dozens of routine messages: confirmations, instructions, simple questions, friendly checkpoints. Those are the ones eating your evenings, and those are the ones Watchtower is built for.

The Bottom Line

AI in guest communication only works if it's grounded in your actual property data and if you stay in the loop. Watchtower is opinionated about both. Your guidebook is the knowledge base, your tone shapes the voice, and you approve every Inbox draft before it ships. No hidden Inbox auto-send and no guessing when a fact cannot be verified.

Pro includes built-in AI, automatic inquiry drafts that still wait for approval, and optional automatic public chat. The host's judgment remains the key step for every Inbox send.