omniwire_open_browser

THE RISK

High Risk

Why omniwire_open_browser needs a policy

This tool executes a browser action on a remote machine, opening an arbitrary URL. This constitutes an external operation whose effects depend on the argument (the URL). A malicious agent could direct the browser to phishing sites, trigger drive-by downloads, or initiate web-based actions on the remote display.

From the tool's definition Open a URL in a browser" — triggers an external browser action on a remote node ("thinkpad (has GPU + display)")

Documented attack patterns abuse exactly the kind of access omniwire_open_browser gives an agent:

POLICY

How to control omniwire_open_browser

PolicyLayer is an MCP gateway — it sits between your AI agents and OmniWire, and nothing reaches the server without passing your rules. This is the rule we recommend for omniwire_open_browser:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "omniwire_open_browser": {
      "limits": [
        {
          "counter": "omniwire_open_browser_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

omniwire_open_browser 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.

Create a free account and register OmniWire — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More OmniWire tools

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All 88 OmniWire tools →

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Go deeper

High-risk tools in OmniWire → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about omniwire_open_browser

What does the omniwire_open_browser tool do? +

Open a URL in a browser. Default: thinkpad (has GPU + display). It is categorised as a Execute tool in the OmniWire MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on omniwire_open_browser? +

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

What risk level is omniwire_open_browser? +

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

Can I rate-limit omniwire_open_browser? +

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

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

omniwire_open_browser is provided by the OmniWire MCP server (voidchecksum/omniwire). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every OmniWire tool call.

Start from OmniWire, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →