safari_navigate_back · MacWright MCP: Risk & Policy

WHAT IT DOES

What safari_navigate_back does on MacWright

AI agents invoke safari_navigate_back 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_navigate_back needs a policy

This tool executes a browser control action (navigate back) that interacts with the Safari application and changes its displayed state. While not destructive or financial, it is an Execute action because it triggers an external operation (Safari navigation) beyond simple data retrieval.

From the tool's definition Tool description states it 'Go[es] back to the previous page in the Safari history' and is 'Equivalent to clicking the back button or pressing Cmd+[' — this triggers browser navigation, an external operation whose effects depend on the current browser state.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

safari_navigate_back Rate-limited

safari_navigate_back 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_navigate_back": {
      "limits": [
        {
          "counter": "safari_navigate_back_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_navigate_back

What does the safari_navigate_back tool do? +

Go back to the previous page in the Safari history. Equivalent to clicking the back button or pressing Cmd+[. 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_navigate_back? +

Register the MacWright MCP server in PolicyLayer and add a rule for safari_navigate_back: 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_navigate_back? +

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

Can I rate-limit safari_navigate_back? +

Yes. Add a rate_limit block to the safari_navigate_back 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_navigate_back completely? +

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

safari_navigate_back 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.