type · Puppeteer Real Browser MCP: Risk & Policy

WHAT IT DOES

What type does on Puppeteer Real Browser

AI agents invoke type to trigger actions in Puppeteer Real Browser. 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 type needs a policy

This tool interacts with a live browser by injecting text into input fields, triggering browser-level actions (input events, form state changes) that can have downstream effects depending on the target field (e.g., search queries, login forms, form submissions). It is a browser action/execution tool, not merely a read or simple write to a data store.

From the tool's definition Type text into an input field

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

type Rate-limited

type 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": {
    "type": {
      "limits": [
        {
          "counter": "type_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 Puppeteer Real Browser, so you can run agents against it safely.

FAQ

Questions about type

What does the type tool do? +

Type text into an input field. It is categorised as a Execute tool in the Puppeteer Real Browser MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on type? +

Register the Puppeteer Real Browser MCP server in PolicyLayer and add a rule for type: 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 Puppeteer Real Browser. Nothing to install.

What risk level is type? +

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

Can I rate-limit type? +

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

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

type is provided by the Puppeteer Real Browser MCP server (puppeteer-real-browser-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.