stop_spiderfoot_web

THE RISK

High Risk

Why stop_spiderfoot_web needs a policy

Stopping a running process is an Execute action (triggers external operations), but the blast radius is low because: (1) it only affects a web server process that is presumably part of the pentesting workflow, (2) there is no data loss or financial impact, and (3) the operation is reversible by restarting the process.

From the tool's definition Tool description states it 'Terminates a background SpiderFoot web server process' - this is process termination, which is an external operation that affects system state.

Documented attack patterns abuse exactly the kind of access stop_spiderfoot_web gives an agent:

POLICY

How to control stop_spiderfoot_web

PolicyLayer is an MCP gateway — it sits between your AI agents and Pentester-MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for stop_spiderfoot_web:

policy.json

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

stop_spiderfoot_web 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.

Create a free account and register Pentester-MCP — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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All 337 Pentester-MCP tools →

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Go deeper

Govern code and CI agents → Branch allowlists, approval on merges, and rate caps on the build and pipeline tools agents trigger.
High-risk tools in Pentester-MCP → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →
PolicyLayer vs alternatives → How deterministic, per-call MCP policy compares with gateways, identity layers, and authorisation platforms.

FAQ

Questions about stop_spiderfoot_web

What does the stop_spiderfoot_web tool do? +

Terminates a background SpiderFoot web server process. 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 stop_spiderfoot_web? +

Register the Pentester- MCP server in PolicyLayer and add a rule for stop_spiderfoot_web: 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 stop_spiderfoot_web? +

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

Can I rate-limit stop_spiderfoot_web? +

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

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

stop_spiderfoot_web 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.

Enforce policy on every Pentester-MCP tool call.

Start from Pentester-MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →