send_product_message · Whatsapp MCP: Risk & Policy

WHAT IT DOES

What send_product_message does on Whatsapp

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

WHY IT NEEDS A POLICY

Why send_product_message needs a policy

This tool sends a WhatsApp message containing a product from a catalog to a recipient. It creates outbound communication (a Write action), which can have significant blast-radius implications if misused by an AI agent — e.g., spamming product messages to many users. It does not delete data or move money, but sending unsolicited commercial product messages at scale is a high-severity risk.

From the tool's definition Send a single product from your catalog

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

send_product_message Rate-limited

send_product_message 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_product_message": {
      "limits": [
        {
          "counter": "send_product_message_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 Whatsapp, so you can run agents against it safely.

FAQ

Questions about send_product_message

What does the send_product_message tool do? +

Send a single product from your catalog. Requires a connected catalog. It is categorised as a Write tool in the Whatsapp 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_product_message? +

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

What risk level is send_product_message? +

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

Can I rate-limit send_product_message? +

Yes. Add a rate_limit block to the send_product_message 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_product_message completely? +

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

send_product_message is provided by the Whatsapp MCP server (spirit122/whatsapp-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.