playwright_iframe_fill

THE RISK

High Risk

Why playwright_iframe_fill needs a policy

This tool performs a browser action (filling an input element within an iframe) which is an Execute-category operation. It interacts with live browser state and could be used to submit forms, enter credentials, or manipulate web content. While not directly destructive or financial, misuse could lead to unintended form submissions or data entry in sensitive contexts.

From the tool's definition Fill an element in an iframe on the page — triggers a browser interaction (filling a form field inside an iframe) via Playwright automation

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

POLICY

How to control playwright_iframe_fill

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

policy.json

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

playwright_iframe_fill 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 RunAutomation 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

Related tools and policies

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Go deeper

High-risk tools in RunAutomation 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.
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 playwright_iframe_fill

What does the playwright_iframe_fill tool do? +

Fill an element in an iframe on the page. It is categorised as a Execute tool in the RunAutomation 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 playwright_iframe_fill? +

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

What risk level is playwright_iframe_fill? +

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

Can I rate-limit playwright_iframe_fill? +

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

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

playwright_iframe_fill is provided by the RunAutomation MCP Server MCP server (tayyabakmal1/runautomation-mcpserver). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every RunAutomation MCP Server tool call.

Start from RunAutomation 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 →