select_room · Mcp Hilton MCP: Risk & Policy

WHAT IT DOES

What select_room does on Mcp Hilton

AI agents use select_room to create or update resources in Mcp Hilton — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mcp Hilton environment.

WHY IT NEEDS A POLICY

Why select_room needs a policy

This tool commits the user to a booking flow for a hotel room, which creates financial and transactional obligations. While the booking may not be finalized until checkout (another sibling tool), selecting a room and initiating the booking flow modifies the transactional state and moves the user closer to a financial commitment.

From the tool's definition Tool description states it 'Select a specific room type to proceed to booking. Initiates the booking flow for the chosen room.' The action of initiating a booking flow is a reversible modification of state (a reservation in progress can be cancelled via the…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

select_room Rate-limited

select_room stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "select_room": {
      "limits": [
        {
          "counter": "select_room_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Mcp Hilton, so you can run agents against it safely.

FAQ

Questions about select_room

What does the select_room tool do? +

Select a specific room type to proceed to booking. Initiates the booking flow for the chosen room. It is categorised as a Write tool in the Mcp Hilton MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on select_room? +

Register the Mcp Hilton MCP server in PolicyLayer and add a rule for select_room: 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 Mcp Hilton. Nothing to install.

What risk level is select_room? +

select_room is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit select_room? +

Yes. Add a rate_limit block to the select_room 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.

How do I block select_room completely? +

Set action: deny in the PolicyLayer policy for select_room. 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.

What MCP server provides select_room? +

select_room is provided by the Mcp Hilton MCP server (markswendsen-code/mcp-hilton). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.