create_reservation · Enterprise Rent-A-Car MCP Connector MCP

WHAT IT DOES

What create_reservation does on Enterprise Rent-A-Car MCP Connector

AI agents use create_reservation to create or update resources in Enterprise Rent-A-Car MCP Connector — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Enterprise Rent-A-Car MCP Connector environment.

WHY IT NEEDS A POLICY

Why create_reservation needs a policy

This tool creates a binding reservation that commits a customer to a rental contract, generating financial obligations and modifying the rental company's booking system. While it creates rather than deletes data, the creation of a reservation is a significant write operation that should be carefully controlled.

From the tool's definition Tool description states 'Create a new Enterprise Rent-A-Car reservation' which creates a financial obligation (rental agreement) and modifies data in the Enterprise system.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_reservation Rate-limited

create_reservation 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": {
    "create_reservation": {
      "limits": [
        {
          "counter": "create_reservation_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 Enterprise Rent-A-Car MCP Connector, so you can run agents against it safely.

FAQ

Questions about create_reservation

What does the create_reservation tool do? +

Create a new Enterprise Rent-A-Car reservation. Requires vehicle selection, location details, dates, and driver information. It is categorised as a Write tool in the Enterprise Rent-A-Car MCP Connector MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_reservation? +

Register the Enterprise Rent-A-Car MCP Connector MCP server in PolicyLayer and add a rule for create_reservation: 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 Enterprise Rent-A-Car MCP Connector. Nothing to install.

What risk level is create_reservation? +

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

Can I rate-limit create_reservation? +

Yes. Add a rate_limit block to the create_reservation 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 create_reservation completely? +

Set action: deny in the PolicyLayer policy for create_reservation. 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 create_reservation? +

create_reservation is provided by the Enterprise Rent-A-Car MCP Connector MCP server (markswendsen-code/mcp-enterprise). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.