scan_vulnerabilities

THE RISK

Low Risk

Why scan_vulnerabilities needs a policy

This tool performs security scanning and analysis of web pages to identify vulnerabilities. While it accesses external systems and websites, it does not execute code on those targets, create, modify, or delete data, nor does it move money. It is fundamentally a Read operation that retrieves vulnerability information.

From the tool's definition The tool name is 'scan_vulnerabilities' and the description states it 'Scan web pages for common security vulnerabilities.' The verb 'scan' and the analysis-focused intent indicate this is a read-only operation that retrieves and analyzes security-related…

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

POLICY

How to control scan_vulnerabilities

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "scan_vulnerabilities": {}
  }
}

scan_vulnerabilities is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

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

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EXPLORE

Related tools and policies

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All 48 MCP Web Scrape tools →

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about scan_vulnerabilities

What does the scan_vulnerabilities tool do? +

Scan web pages for common security vulnerabilities. It is categorised as a Read tool in the MCP Web Scrape MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on scan_vulnerabilities? +

Register the MCP Web Scrape MCP server in PolicyLayer and add a rule for scan_vulnerabilities: 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 Web Scrape. Nothing to install.

What risk level is scan_vulnerabilities? +

scan_vulnerabilities is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit scan_vulnerabilities? +

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

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

scan_vulnerabilities is provided by the MCP Web Scrape MCP server (mukul975/mcp-web-scrape). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCP Web Scrape tool call.

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

CHECK YOUR STACK →