browser_snapshot

A read tool on the Playwright MCP server.

SERVERPlaywright MCP SOURCEalialobidm/playwright-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/alialobidm-playwright-mcp/browser-snapshot.md

WHAT IT DOES

What browser_snapshot does on Playwright MCP

AI agents call browser_snapshot to retrieve information from Playwright MCP without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why browser_snapshot is rated Low

The tool name and server context indicate this retrieves a snapshot of the current browser state (DOM, accessibility tree, etc.) for inspection purposes. This is a read operation with no side effects—it observes page state without modifying, executing, or deleting anything. Blast radius is minimal since misuse only exposes information already accessible within the browser context.

From the tool's definition Tool name 'browser_snapshot' combined with server description stating it provides 'accessibility snapshots' indicates a retrieval operation that captures page state without modification.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs browser_snapshot safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Playwright MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For browser_snapshot, this is the rule to start with:

browser_snapshot Allowed

browser_snapshot is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "browser_snapshot": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Playwright MCP, apply this rule, and every browser_snapshot call is checked against it from then on.

FAQ

Questions about browser_snapshot

What does the browser_snapshot tool do? +

browser_snapshot is a read tool on the Playwright MCP server. It is categorised as a Read tool in the Playwright MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on browser_snapshot? +

Register the Playwright MCP server in PolicyLayer and add a rule for browser_snapshot: 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. Nothing to install.

What risk level is browser_snapshot? +

browser_snapshot is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit browser_snapshot? +

Yes. Add a rate_limit block to the browser_snapshot 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_snapshot completely? +

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

browser_snapshot is provided by the Playwright MCP server (alialobidm/playwright-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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