run_lookupsid

A execute tool on the Pentester- MCP server.

SERVERPentester-MCP SOURCEhalilkirazkaya/pentester-mcp

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/halilkirazkaya-pentester-mcp/run-lookupsid.md

WHAT IT DOES

What run_lookupsid does on Pentester-MCP

AI agents invoke run_lookupsid to trigger actions in Pentester-MCP. 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.

RISK

Why run_lookupsid is rated High

This tool executes a penetration testing utility (lookupsid) whose effects are determined by the arguments provided. Lookupsid is used to query Windows systems for user and group information, which constitutes reconnaissance code execution. While not destructive or financial, it performs active system enumeration that could expose sensitive information or be part of a broader attack chain.

From the tool's definition Tool name 'run_lookupsid' indicates execution of the lookupsid utility, a reconnaissance tool commonly used in penetration testing to enumerate user accounts and SIDs (Security Identifiers) on Windows systems.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs run_lookupsid safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Pentester-MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For run_lookupsid, this is the rule to start with:

run_lookupsid Rate-limited

run_lookupsid 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": {
    "run_lookupsid": {
      "limits": [
        {
          "counter": "run_lookupsid_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Pentester-MCP, apply this rule, and every run_lookupsid call is checked against it from then on.

FAQ

Questions about run_lookupsid

What does the run_lookupsid tool do? +

run_lookupsid is a execute tool on the Pentester MCP server. It is categorised as a Execute tool in the Pentester-MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on run_lookupsid? +

Register the Pentester MCP server in PolicyLayer and add a rule for run_lookupsid: 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 Pentester-MCP. Nothing to install.

What risk level is run_lookupsid? +

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

Can I rate-limit run_lookupsid? +

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

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

run_lookupsid is provided by the Pentester MCP server (halilkirazkaya/pentester-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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