cloudron_update_app · Mcp Cloudron MCP: Risk & Policy

WHAT IT DOES

What cloudron_update_app does on Mcp Cloudron

AI agents invoke cloudron_update_app to trigger actions in Mcp Cloudron. 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 cloudron_update_app needs a policy

Updating an app triggers an external operation (deployment/upgrade process) that modifies the running state of an application. While it writes new state, it's fundamentally an execution trigger for an async system operation rather than a simple data write. Misuse could cause application downtime or instability, making severity high.

From the tool's definition Update an application to a newer version... Returns task ID for async operation tracking

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

cloudron_update_app Rate-limited

cloudron_update_app 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": {
    "cloudron_update_app": {
      "limits": [
        {
          "counter": "cloudron_update_app_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 Mcp Cloudron, so you can run agents against it safely.

FAQ

Questions about cloudron_update_app

What does the cloudron_update_app tool do? +

Update an application to a newer version. Performs pre-flight validation to check app exists and is in installed state. Returns task ID for async operation tracking via cloudron_task_status. It is categorised as a Execute tool in the Mcp Cloudron MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on cloudron_update_app? +

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

What risk level is cloudron_update_app? +

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

Can I rate-limit cloudron_update_app? +

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

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

cloudron_update_app is provided by the Mcp Cloudron MCP server (serenichron/mcp-cloudron). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.