postman_scan · MCP Kali Pentest MCP: Risk & Policy

WHAT IT DOES

What postman_scan does on MCP Kali Pentest

AI agents invoke postman_scan to trigger actions in MCP Kali Pentest. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why postman_scan needs a policy

This tool runs Postman/Newman collections which execute HTTP requests against API endpoints. While framed as 'testing', it actively sends requests to external systems, potentially including authentication bypass attempts, injection attacks, and other API security probes. The effects depend on the collection contents and target, making this an Execute-category tool.

From the tool's definition 'Run collections for API security testing' — actively executes API requests against targets using Postman/Newman collections

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

postman_scan Rate-limited

postman_scan stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "postman_scan": {
      "limits": [
        {
          "counter": "postman_scan_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-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 Kali Pentest, so you can run agents against it safely.

FAQ

Questions about postman_scan

What does the postman_scan tool do? +

API testing with Postman/Newman. Run collections for API security testing. It is categorised as a Execute tool in the MCP Kali Pentest MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on postman_scan? +

Register the MCP Kali Pentest MCP server in PolicyLayer and add a rule for postman_scan: 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 Kali Pentest. Nothing to install.

What risk level is postman_scan? +

postman_scan is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit postman_scan? +

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

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

postman_scan is provided by the MCP Kali Pentest MCP server (root1856/mcpkali). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.