web_scan

Run one web fingerprinting scanner selected by tool.

SERVERHercules MCP SOURCE0xmihirk/hercules-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/0xmihirk-hercules-mcp/web-scan.md

WHAT IT DOES

What web_scan does on Hercules MCP

AI agents invoke web_scan to trigger actions in Hercules 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 web_scan is rated High

This tool executes an active web fingerprinting scanner against target systems. Running scanners is an external operation with real effects on targets — it sends network probes, can trigger IDS/IPS alerts, and may be considered unauthorized access if misused.

From the tool's definition 'Run one web fingerprinting scanner selected by tool' in a 'containerized Kali Linux environment' with 'industry-standard offensive security tools'

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs web_scan safely

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

web_scan Rate-limited

web_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": {
    "web_scan": {
      "limits": [
        {
          "counter": "web_scan_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 Hercules MCP, apply this rule, and every web_scan call is checked against it from then on.

FAQ

Questions about web_scan

What does the web_scan tool do? +

Run one web fingerprinting scanner selected by tool. It is categorised as a Execute tool in the Hercules 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 web_scan? +

Register the Hercules MCP server in PolicyLayer and add a rule for web_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 Hercules MCP. Nothing to install.

What risk level is web_scan? +

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

Can I rate-limit web_scan? +

Yes. Add a rate_limit block to the web_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 web_scan completely? +

Set action: deny in the PolicyLayer policy for web_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 web_scan? +

web_scan is provided by the Hercules MCP server (0xmihirk/hercules-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Hercules, and thousands of servers like it.

This server

All 45 Hercules tools → High-risk tools on this server →

Across the catalogue

run_emba_scan on EMBA-MCP → All high-risk MCP tools → The MCP Attack Database →

Guides

Govern code and CI agents →Agent sandbox →Least privilege for MCP →