app_open_url · K-Personal MCP: Risk & Policy

WHAT IT DOES

What app_open_url does on K-Personal MCP

AI agents invoke app_open_url to trigger actions in K-Personal MCP. 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 app_open_url needs a policy

This tool launches an external application (the default browser) and navigates to a URL, triggering an external operation. The effects depend on the URL argument — it could open benign pages or malicious/phishing sites, initiate downloads, or interact with web services. This qualifies as Execute since it triggers an external operation whose effects depend on the argument provided.

From the tool's definition URL을 기본 브라우저로 엽니다 (Opens a URL with the default browser)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

app_open_url Rate-limited

app_open_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": {
    "app_open_url": {
      "limits": [
        {
          "counter": "app_open_url_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 K-Personal MCP, so you can run agents against it safely.

FAQ

Questions about app_open_url

What does the app_open_url tool do? +

URL을 기본 브라우저로 엽니다. It is categorised as a Execute tool in the K-Personal MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on app_open_url? +

Register the K-Personal MCP server in PolicyLayer and add a rule for app_open_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 K-Personal MCP. Nothing to install.

What risk level is app_open_url? +

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

Can I rate-limit app_open_url? +

Yes. Add a rate_limit block to the app_open_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 app_open_url completely? +

Set action: deny in the PolicyLayer policy for app_open_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 app_open_url? +

app_open_url is provided by the K-Personal MCP server (lee30934-byte/k-personal-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.