promote_participants · Zappaz MCP Server MCP: Risk & Policy

WHAT IT DOES

What promote_participants does on Zappaz MCP Server

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

WHY IT NEEDS A POLICY

Why promote_participants needs a policy

This tool creates or modifies group roles by elevating participants to administrator status in WhatsApp groups. While reversible (participants can be demoted), it represents a significant write operation that alters access control and permissions. It is not destructive (no data deletion), not financial, and not code execution.

From the tool's definition promote_participants - Promove participantes a administradores de um grupo na Zappaz API (promotes participants to group administrators). This modifies group member roles and permissions, which is a reversible change to group structure and access control.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

promote_participants Rate-limited

promote_participants 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_participants": {
      "limits": [
        {
          "counter": "promote_participants_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 Zappaz MCP Server, so you can run agents against it safely.

FAQ

Questions about promote_participants

What does the promote_participants tool do? +

Promove participantes a administradores de um grupo na Zappaz API. It is categorised as a Write tool in the Zappaz MCP Server 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_participants? +

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

What risk level is promote_participants? +

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

Can I rate-limit promote_participants? +

Yes. Add a rate_limit block to the promote_participants 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_participants completely? +

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

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