run_browser_info_diagnostic_tool

THE RISK

High Risk

Why run_browser_info_diagnostic_tool needs a policy

This tool executes an external script (get_browser_info.py) to collect browser telemetry/fingerprint data. The execution of arbitrary scripts places this in the Execute category. Severity is medium because it runs a specific named script rather than arbitrary user-supplied code, but fingerprint collection could expose sensitive browser state or be misused for tracking/evasion purposes.

From the tool's definition 'Collect browser fingerprint telemetry via scripts/get_browser_info.py' — runs an external Python script to collect fingerprint data

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

POLICY

How to control run_browser_info_diagnostic_tool

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

policy.json

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

run_browser_info_diagnostic_tool 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 Web Scraper — 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

More Web Scraper tools

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All 62 Web Scraper tools →

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Go deeper

High-risk tools in Web Scraper → 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 →

FAQ

Questions about run_browser_info_diagnostic_tool

What does the run_browser_info_diagnostic_tool tool do? +

Collect browser fingerprint telemetry via scripts/get_browser_info.py. It is categorised as a Execute tool in the Web Scraper 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_browser_info_diagnostic_tool? +

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

What risk level is run_browser_info_diagnostic_tool? +

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

Can I rate-limit run_browser_info_diagnostic_tool? +

Yes. Add a rate_limit block to the run_browser_info_diagnostic_tool 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_browser_info_diagnostic_tool completely? +

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

run_browser_info_diagnostic_tool is provided by the Web Scraper MCP server (imyourboyroy/webscrapertoolkit). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Web Scraper tool call.

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

CHECK YOUR STACK →