query_selector_meta

A read tool on the Playwright MCP server.

SERVERPlaywright MCP Server SOURCEalexrwilliam/playwright-mcp-server

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/alexrwilliam-playwright-mcp-server/query-selector-meta.md

WHAT IT DOES

What query_selector_meta does on Playwright MCP Server

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

RISK

Why query_selector_meta is rated Low

The name implies a read operation (query) on DOM element selector metadata, which is consistent with a Read category. However, the empty description lowers confidence. Given the server context (Playwright browser automation), this likely retrieves information about DOM elements without side effects. Severity is medium because browser context access can expose sensitive page data.

From the tool's definition Tool name 'query_selector_meta' suggests querying/reading DOM selector metadata; description is empty and uninformative.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs query_selector_meta safely

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

query_selector_meta Allowed

query_selector_meta 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": {
    "query_selector_meta": {}
  }
}

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

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

FAQ

Questions about query_selector_meta

What does the query_selector_meta tool do? +

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

How do I enforce a policy on query_selector_meta? +

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

What risk level is query_selector_meta? +

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

Can I rate-limit query_selector_meta? +

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

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

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

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