Book an unlocked flight — creates real airline reservation with PNR. FREE after unlock. FLOW: search_flights → unlock_flight_offer (quote) → book_flight Requirements: 1) Offer must be unlocked first 2) passenger_ids from search 3) Full passenger details SAFETY: Always provide idempotency_key to p...
Risk signalsHigh parameter count (12 properties)
Part of the BoostedTravel server.
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AI agents call book_flight to retrieve information from BoostedTravel 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 book_flight 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": {
"book_flight": {}
}
}See the full BoostedTravel policy for all 8 tools.
These attack patterns abuse exactly the kind of access book_flight 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.
Book an unlocked flight — creates real airline reservation with PNR. FREE after unlock. FLOW: search_flights → unlock_flight_offer (quote) → book_flight Requirements: 1) Offer must be unlocked first 2) passenger_ids from search 3) Full passenger details SAFETY: Always provide idempotency_key to prevent double-bookings if this call is retried. Use any unique string (e.g., UUID). If the same key is sent twice, returns the original booking. ERROR HANDLING: Errors include error_code and error_category fields. transient (SUPPLIER_TIMEOUT, RATE_LIMITED) → safe to retry after short delay validation (INVALID_IATA, INVALID_DATE) → fix input, then retry business (OFFER_EXPIRED, PAYMENT_DECLINED) → requires human decision. It is categorised as a Read tool in the BoostedTravel MCP Server, which means it retrieves data without modifying state.
Register the BoostedTravel MCP server in PolicyLayer and add a rule for book_flight: 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 BoostedTravel. Nothing to install.
book_flight 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 book_flight 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 book_flight. 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.
book_flight is provided by the BoostedTravel MCP server (https://api.boostedchat.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 8 BoostedTravel tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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