Verify that a vacation-rental host domain is a valid Vacation Rental Protocol (VRP) node before trusting it. Reads https://{domain}/.well-known/vacation-rental.json, follows the node JWKS, and confirms protocol identity, canonical host-domain control, Ed25519 signing keys, and a verified stay-off...
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AI agents call verify_vacation_rental_node to retrieve information from Hemmabo without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though verify_vacation_rental_node only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"verify_vacation_rental_node": {}
}
}See the full Hemmabo policy for all 15 tools.
These attack patterns abuse exactly the kind of access verify_vacation_rental_node gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Verify that a vacation-rental host domain is a valid Vacation Rental Protocol (VRP) node before trusting it. Reads https://{domain}/.well-known/vacation-rental.json, follows the node JWKS, and confirms protocol identity, canonical host-domain control, Ed25519 signing keys, and a verified stay-offer endpoint. This is a read-only trust check only: it does not check availability, calculate pricing, create bookings, lock quotes, collect guest details, or start payment. To fetch live dates, price, booking rules, and the visual stay-offer widget, call get_verified_stay_offer with the verified domain plus check-in, check-out, and guest count.. It is categorised as a Read tool in the Hemmabo MCP Server, which means it retrieves data without modifying state.
Register the Hemmabo MCP server in PolicyLayer and add a rule for verify_vacation_rental_node: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Hemmabo. Nothing to install.
verify_vacation_rental_node is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the verify_vacation_rental_node rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for verify_vacation_rental_node. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
verify_vacation_rental_node is provided by the Hemmabo MCP server (HemmaBo-se/hemmabo-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 15 Hemmabo tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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