safari_tabs · MacWright MCP: Risk & Policy

WHAT IT DOES

What safari_tabs does on MacWright

AI agents invoke safari_tabs to trigger actions in MacWright. 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 safari_tabs needs a policy

This tool performs multiple browser tab operations including creating and closing tabs (destructive/write actions) and selecting tabs (execute). Since it spans multiple categories, the most severe applicable is Execute (browser actions). Closing tabs could result in loss of unsaved data. The tool triggers external browser operations whose effects depend on arguments passed to it.

From the tool's definition List, create, close, or select a browser tab

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

safari_tabs Rate-limited

safari_tabs 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": {
    "safari_tabs": {
      "limits": [
        {
          "counter": "safari_tabs_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 MacWright, so you can run agents against it safely.

FAQ

Questions about safari_tabs

What does the safari_tabs tool do? +

List, create, close, or select a browser tab. Use waitUntil with action=. It is categorised as a Execute tool in the MacWright MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on safari_tabs? +

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

What risk level is safari_tabs? +

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

Can I rate-limit safari_tabs? +

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

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

safari_tabs is provided by the MacWright MCP server (ruchit-p/macwright). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.