group_participants · Wa Bridge MCP: Risk & Policy

WHAT IT DOES

What group_participants does on Wa Bridge

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

WHY IT NEEDS A POLICY

Why group_participants needs a policy

This tool modifies group membership and roles (adding/removing participants, changing admin status). While removal could be seen as destructive, group membership changes are generally reversible (participants can be re-added, roles can be changed back), placing this in the Write category.

From the tool's definition Add, remove, promote, or demote group participants

Risk signalsAdmin/system-level operation

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

group_participants Rate-limited

group_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": {
    "group_participants": {
      "limits": [
        {
          "counter": "group_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 Wa Bridge, so you can run agents against it safely.

FAQ

Questions about group_participants

What does the group_participants tool do? +

Add, remove, promote, or demote group participants. Only works if the session is a group admin (for add/remove/promote/demote). It is categorised as a Write tool in the Wa Bridge MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on group_participants? +

Register the Wa Bridge MCP server in PolicyLayer and add a rule for group_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 Wa Bridge. Nothing to install.

What risk level is group_participants? +

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

Can I rate-limit group_participants? +

Yes. Add a rate_limit block to the group_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 group_participants completely? +

Set action: deny in the PolicyLayer policy for group_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 group_participants? +

group_participants is provided by the Wa Bridge MCP server (obirimensah05/whatsapp-bridge). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.