create_request · Postman MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_request does on Postman MCP Server

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

WHY IT NEEDS A POLICY

Why create_request needs a policy

The tool adds new request objects to Postman collections, which constitutes data creation and modification. This is reversible (requests can be deleted via the sibling delete_request tool), making it Write rather than Destructive.

From the tool's definition Tool creates new API requests in Postman collections, as stated: 'Create a new API request in a Postman collection'. This is a create operation that modifies collection state reversibly.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_request Rate-limited

create_request 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_request": {
      "limits": [
        {
          "counter": "create_request_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 Postman MCP Server, so you can run agents against it safely.

FAQ

Questions about create_request

What does the create_request tool do? +

Create a new API request in a Postman collection. It is categorised as a Write tool in the Postman MCP Server 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_request? +

Register the Postman MCP Server MCP server in PolicyLayer and add a rule for create_request: 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 Postman MCP Server. Nothing to install.

What risk level is create_request? +

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

Can I rate-limit create_request? +

Yes. Add a rate_limit block to the create_request 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_request completely? +

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

create_request is provided by the Postman MCP Server MCP server (sondang91/postman-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.