promote_user · Run402 MCP: Risk & Policy

WHAT IT DOES

What promote_user does on Run402

AI agents use promote_user 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 promote_user needs a policy

This tool elevates a user's privileges to project_admin, granting them access to manage secrets. While it is a reversible write operation (role assignment), the blast radius is high because misuse could grant an attacker or unauthorized user administrative control over secrets and project resources.

From the tool's definition Promote a user to project_admin role by email. Admins can manage secrets from the browser.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

promote_user Rate-limited

promote_user 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": {
    "promote_user": {
      "limits": [
        {
          "counter": "promote_user_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 promote_user

What does the promote_user tool do? +

Promote a user to project_admin role by email. Admins can manage secrets from the browser. Requires service_key. 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 promote_user? +

Register the Run402 MCP server in PolicyLayer and add a rule for promote_user: 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 promote_user? +

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

Can I rate-limit promote_user? +

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

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

promote_user 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.