publish_app · Run402 MCP: Risk & Policy

WHAT IT DOES

What publish_app does on Run402

AI agents use publish_app to create or update resources in Run402 — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Run402 environment.

WHY IT NEEDS A POLICY

Why publish_app needs a policy

The tool modifies project state by publishing it and adjusting visibility/discoverability settings. These are reversible changes (unpublish, change tags), so it falls under Write rather than Destructive. Severity is medium because publishing a project could expose it unintentionally or modify its discoverability in ways that affect users, but the operation is not destructive and has no direct financial impact.

From the tool's definition 'Publish a project as a forkable app. Set visibility and tags for discoverability.' — creates a publishable artifact and modifies project metadata (visibility, tags).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

publish_app Rate-limited

publish_app stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "publish_app": {
      "limits": [
        {
          "counter": "publish_app_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Run402, so you can run agents against it safely.

FAQ

Questions about publish_app

What does the publish_app tool do? +

Publish a project as a forkable app. Set visibility and tags for discoverability. It is categorised as a Write tool in the Run402 MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on publish_app? +

Register the Run402 MCP server in PolicyLayer and add a rule for publish_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 Run402. Nothing to install.

What risk level is publish_app? +

publish_app is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit publish_app? +

Yes. Add a rate_limit block to the publish_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 publish_app completely? +

Set action: deny in the PolicyLayer policy for publish_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 publish_app? +

publish_app is provided by the Run402 MCP server (kychee-com/run402). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.