Book a hotel for real money — the TVA hotel API takes raw card details directly in this call (no
AI agents use BOOK_HOTEL to commit financial operations through Travel Agent MCP Server — usually the final step of a payment, billing, or trading workflow. A call moves real money.
This tool explicitly commits a financial obligation (hotel booking charged to a payment card) and handles raw card details, making it both a Financial category tool and critically severe. Misuse could result in unauthorized financial transactions and exposure of sensitive payment card data.
From the tool's definition "Book a hotel for real money" and "takes raw card details directly in this call" — the tool processes a financial transaction involving payment card data
Attacks that exploit this kind of access
Book a hotel for real money — the TVA hotel API takes raw card details directly in this call (no. It is categorised as a Financial tool in the Travel Agent MCP Server MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Travel Agent MCP Server MCP server in PolicyLayer and add a rule for BOOK_HOTEL: 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 Travel Agent MCP Server. Nothing to install.
BOOK_HOTEL is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the BOOK_HOTEL 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_HOTEL. 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_HOTEL is provided by the Travel Agent MCP Server MCP server (nxgnosis/travelagentmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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