Create a secure payment link for a VIP Meet & Greet booking, with optional transfer combo. M&G prices are FIXED (CDG/Orly 250€ base for 2 pax + 50€/extra, Gare du Nord 500€ + 100€/extra, Gare de Lyon 350€ + 75€/extra) — do NOT call get_quote for the M&G part. A connection (service_type='connectio...
Risk signalsHigh parameter count (27 properties)
Part of the Booking server.
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AI agents use book_meetgreet to create or modify resources in Booking. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call book_meetgreet repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Booking.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"book_meetgreet": {
"limits": [
{
"counter": "book_meetgreet_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Booking policy for all 8 tools.
These attack patterns abuse exactly the kind of access book_meetgreet gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Create a secure payment link for a VIP Meet & Greet booking, with optional transfer combo. M&G prices are FIXED (CDG/Orly 250€ base for 2 pax + 50€/extra, Gare du Nord 500€ + 100€/extra, Gare de Lyon 350€ + 75€/extra) — do NOT call get_quote for the M&G part. A connection (service_type='connection': arrival flight → connecting departure flight with fast-track between terminals) is billed as TWO M&G services = the location price ×2 (e.g. CDG 2 pax = 500€). For a combo with a transfer (e.g. CDG M&G + transfer to a hotel), call get_quote first for the transfer leg and pass the resulting quote_id + vehicle_id in transfer. If lead time is less than 12h before pickup, returns LEAD_TIME_TOO_SHORT — the caller must fall back to manual notification instead of retrying. If flight cannot be validated, returns FLIGHT_NOT_FOUND — ask the customer to re-confirm the flight number, or set flight_unverified=true with manual_airline + manual_origin to force-accept.. It is categorised as a Write tool in the Booking MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Booking MCP server in PolicyLayer and add a rule for book_meetgreet: 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 Booking. Nothing to install.
book_meetgreet is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the book_meetgreet 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_meetgreet. 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_meetgreet is provided by the Booking MCP server (https://mcp-mydriverparis.mydriverparis.workers.dev/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 Booking tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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