browser_take_screenshot

THE RISK

High Risk

Why browser_take_screenshot needs a policy

Taking a screenshot involves executing a browser action against the current browser state, which falls under the Execute category. The empty description lowers confidence, but the name strongly suggests a browser automation/execution action. Severity is high because an AI agent could use this to capture sensitive on-screen information or confirm the state of other high-impact operations.

From the tool's definition Tool name 'browser_take_screenshot' implies a browser automation action; description is empty and uninformative.

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

POLICY

How to control browser_take_screenshot

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

policy.json

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

browser_take_screenshot 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 Prometheus MCP Server — 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

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Go deeper

High-risk tools in Prometheus MCP Server → 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.
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Least privilege for MCP → Granting agents the minimum tool surface the task needs.
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FAQ

Questions about browser_take_screenshot

What does the browser_take_screenshot tool do? +

browser_take_screenshot. It is categorised as a Execute tool in the Prometheus MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on browser_take_screenshot? +

Register the Prometheus MCP Server MCP server in PolicyLayer and add a rule for browser_take_screenshot: 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 Prometheus MCP Server. Nothing to install.

What risk level is browser_take_screenshot? +

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

Can I rate-limit browser_take_screenshot? +

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

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

browser_take_screenshot is provided by the Prometheus MCP Server MCP server (awslabs.prometheus-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Prometheus MCP Server tool call.

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

CHECK YOUR STACK →