playwright_hover · Playwright MCP Server MCP: Risk & Policy

WHAT IT DOES

What playwright_hover does on Playwright MCP Server

AI agents invoke playwright_hover to trigger actions in Playwright MCP Server. 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 playwright_hover needs a policy

Hovering is a browser action that dispatches DOM events (mouseover, mouseenter, etc.) which can trigger side effects such as revealing menus, loading content, or executing JavaScript handlers. It is not a passive read operation; it actively interacts with the browser environment, placing it in the Execute category.

From the tool's definition 'Hover an element on the page' — triggers a browser interaction (mouseover/hover event) on a live page element

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

playwright_hover Rate-limited

playwright_hover 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": {
    "playwright_hover": {
      "limits": [
        {
          "counter": "playwright_hover_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 Playwright MCP Server, so you can run agents against it safely.

FAQ

Questions about playwright_hover

What does the playwright_hover tool do? +

Hover an element on the page. It is categorised as a Execute tool in the Playwright MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on playwright_hover? +

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

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

Can I rate-limit playwright_hover? +

Yes. Add a rate_limit block to the playwright_hover 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_hover completely? +

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

playwright_hover is provided by the Playwright MCP Server MCP server (vinothbhc1986/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.