open_app_with_url

Open an application with optional URL/parameters

SERVERMcp Windows SOURCEmukul975/mcp-windows-automation

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/mukul975-mcp-windows-automation/open-app-with-url.md

WHAT IT DOES

What open_app_with_url does on Mcp Windows

AI agents invoke open_app_with_url to trigger actions in Mcp Windows. 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.

RISK

Why open_app_with_url is rated High

This tool executes arbitrary applications on the Windows system, potentially with attacker-controlled URLs or parameters. Misuse could lead to opening malicious URLs in browsers, launching dangerous executables, or exploiting URI handlers. The blast radius is high as it enables arbitrary application execution on the host system.

From the tool's definition 'Open an application with optional URL/parameters' — launches external applications with arbitrary URLs or parameters

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs open_app_with_url safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Mcp Windows, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For open_app_with_url, this is the rule to start with:

open_app_with_url Rate-limited

open_app_with_url 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": {
    "open_app_with_url": {
      "limits": [
        {
          "counter": "open_app_with_url_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Mcp Windows, apply this rule, and every open_app_with_url call is checked against it from then on.

FAQ

Questions about open_app_with_url

What does the open_app_with_url tool do? +

Open an application with optional URL/parameters. It is categorised as a Execute tool in the Mcp Windows MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on open_app_with_url? +

Register the Mcp Windows MCP server in PolicyLayer and add a rule for open_app_with_url: 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 Mcp Windows. Nothing to install.

What risk level is open_app_with_url? +

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

Can I rate-limit open_app_with_url? +

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

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

open_app_with_url is provided by the Mcp Windows MCP server (mukul975/mcp-windows-automation). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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