mittwald_app_open

Open an app installation in the browser.

SERVERMittwald MCP Server SOURCEmittwald/mcp-server

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/mittwald-mcp-server/mittwald-app-open.md

WHAT IT DOES

What mittwald_app_open does on Mittwald MCP Server

AI agents invoke mittwald_app_open to trigger actions in Mittwald MCP Server. 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 mittwald_app_open is rated High

This tool triggers an external browser action (opening a URL), which is an Execute-category operation. It doesn't read/write data or cause destructive changes, but it does invoke an external operation (browser navigation). The blast radius is low since opening a browser page is largely benign.

From the tool's definition Open an app installation in the browser

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs mittwald_app_open safely

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

mittwald_app_open Rate-limited

mittwald_app_open 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": {
    "mittwald_app_open": {
      "limits": [
        {
          "counter": "mittwald_app_open_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 Mittwald MCP Server, apply this rule, and every mittwald_app_open call is checked against it from then on.

FAQ

Questions about mittwald_app_open

What does the mittwald_app_open tool do? +

Open an app installation in the browser. It is categorised as a Execute tool in the Mittwald MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on mittwald_app_open? +

Register the Mittwald MCP Server MCP server in PolicyLayer and add a rule for mittwald_app_open: 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 Mittwald MCP Server. Nothing to install.

What risk level is mittwald_app_open? +

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

Can I rate-limit mittwald_app_open? +

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

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

mittwald_app_open is provided by the Mittwald MCP Server MCP server (mittwald/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Mittwald MCP Server, and thousands of servers like it.

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All high-risk MCP tools → The MCP Attack Database →

Guides

Govern code and CI agents →Agent sandbox →Least privilege for MCP →