run_nuclei

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-nuclei.md

WHAT IT DOES

What run_nuclei does on Pentester-MCP

AI agents invoke run_nuclei 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_nuclei is rated High

Nuclei is designed to execute vulnerability scanning workflows against targets. Even without a description, the tool name and server context (Pentester-MCP explicitly for penetration testing tools) indicate this runs external scanning operations whose effects depend on the target, templates, and configuration provided as arguments.

From the tool's definition Tool name 'run_nuclei' with no description; Nuclei is a well-known open-source vulnerability scanner that executes custom YAML templates against targets, running active security tests that can trigger network traffic, exploit attempts, and potentially cause…

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs run_nuclei 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_nuclei, this is the rule to start with:

run_nuclei Rate-limited

run_nuclei 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_nuclei": {
      "limits": [
        {
          "counter": "run_nuclei_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_nuclei call is checked against it from then on.

FAQ

Questions about run_nuclei

What does the run_nuclei tool do? +

run_nuclei 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_nuclei? +

Register the Pentester MCP server in PolicyLayer and add a rule for run_nuclei: 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_nuclei? +

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

Can I rate-limit run_nuclei? +

Yes. Add a rate_limit block to the run_nuclei 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_nuclei completely? +

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

run_nuclei 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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