playwright_iframe_fill

WHAT IT DOES

What playwright_iframe_fill does on Playwright MCP Server for Security

AI agents use playwright_iframe_fill to create or update resources in Playwright MCP Server for Security — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Playwright MCP Server for Security environment.

WHY IT NEEDS A POLICY

Why playwright_iframe_fill needs a policy

This tool fills (writes data into) a form element within an iframe. It modifies page state by inputting data into fields, which is a Write operation. It could be misused to submit forms or inject data into embedded frames, but it doesn't execute arbitrary code or irreversibly delete data.

From the tool's definition Fill an element in an iframe on the page

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

playwright_iframe_fill Rate-limited

playwright_iframe_fill stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "playwright_iframe_fill": {
      "limits": [
        {
          "counter": "playwright_iframe_fill_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

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 Write tool in the Playwright MCP Server for Security MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on playwright_iframe_fill? +

Register the Playwright MCP Server for Security 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 Playwright MCP Server for Security. Nothing to install.

What risk level is playwright_iframe_fill? +

playwright_iframe_fill is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

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 Playwright MCP Server for Security MCP server (o0x1024/mcp-playwright-security). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.