is_visible

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/is-visible.md

WHAT IT DOES

What is_visible does on Playwright MCP Server

AI agents call is_visible 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 is_visible is rated Low

The tool name 'is_visible' suggests a query operation that retrieves element visibility status. Although the description is empty (lowering confidence slightly), the semantic meaning and placement among other Playwright tools (where sibling tools include both read operations like element inspection and write operations like 'click') indicates this is a Read operation—checking element properties produces no side…

From the tool's definition Tool named 'is_visible' on a Playwright browser automation server; given context of sibling tools like 'click', 'check_checkbox', and 'evaluate', this appears to be a DOM inspection/query tool that checks visibility state of page elements without modifying…

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs is_visible 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 is_visible, this is the rule to start with:

is_visible Allowed

is_visible 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": {
    "is_visible": {}
  }
}

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 is_visible call is checked against it from then on.

FAQ

Questions about is_visible

What does the is_visible tool do? +

is_visible 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 is_visible? +

Register the Playwright MCP Server MCP server in PolicyLayer and add a rule for is_visible: 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 is_visible? +

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

Can I rate-limit is_visible? +

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

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

is_visible 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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