snap_html · PagePixels Screenshots MCP Server MCP

WHAT IT DOES

What snap_html does on PagePixels Screenshots MCP Server

AI agents invoke snap_html to trigger actions in PagePixels Screenshots MCP Server. 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.

WHY IT NEEDS A POLICY

Why snap_html needs a policy

This tool executes a browser rendering operation on provided HTML content, triggering an external service to process and render arbitrary HTML. It is not a simple read operation — it submits content to an external API that executes rendering. Since arbitrary HTML (including scripts) could be submitted, it constitutes an Execute-level action.

From the tool's definition Render provided HTML into a screenshot via PagePixels /snap_html

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

snap_html Rate-limited

snap_html 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": {
    "snap_html": {
      "limits": [
        {
          "counter": "snap_html_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches PagePixels Screenshots MCP Server, so you can run agents against it safely.

FAQ

Questions about snap_html

What does the snap_html tool do? +

Render provided HTML into a screenshot via PagePixels /snap_html (JSON response). It is categorised as a Execute tool in the PagePixels Screenshots 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 snap_html? +

Register the PagePixels Screenshots MCP Server MCP server in PolicyLayer and add a rule for snap_html: 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 PagePixels Screenshots MCP Server. Nothing to install.

What risk level is snap_html? +

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

Can I rate-limit snap_html? +

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

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

snap_html is provided by the PagePixels Screenshots MCP Server MCP server (pagepixels/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.