send_whatsapp_text · Chatkazi MCP: Risk & Policy

WHAT IT DOES

What send_whatsapp_text does on Chatkazi

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

WHY IT NEEDS A POLICY

Why send_whatsapp_text needs a policy

This tool creates and transmits new data (WhatsApp messages) to third parties, which is a reversible Write operation. Severity is high because misuse could result in unauthorized communications, spam, phishing, or social engineering attacks sent to arbitrary recipients via WhatsApp.

From the tool's definition Tool description states it 'Send[s] a plain text WhatsApp message to a recipient' — this creates/sends new communication data to external recipients.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

send_whatsapp_text Rate-limited

send_whatsapp_text 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": {
    "send_whatsapp_text": {
      "limits": [
        {
          "counter": "send_whatsapp_text_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 Chatkazi, so you can run agents against it safely.

FAQ

Questions about send_whatsapp_text

What does the send_whatsapp_text tool do? +

Send a plain text WhatsApp message to a recipient. It is categorised as a Write tool in the Chatkazi MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on send_whatsapp_text? +

Register the Chatkazi MCP server in PolicyLayer and add a rule for send_whatsapp_text: 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 Chatkazi. Nothing to install.

What risk level is send_whatsapp_text? +

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

Can I rate-limit send_whatsapp_text? +

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

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

send_whatsapp_text is provided by the Chatkazi MCP server (lxmwaniky/chatkazi-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.