send_file · WhatsApp MCP Automation MCP: Risk & Policy

WHAT IT DOES

What send_file does on WhatsApp MCP Automation

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

WHY IT NEEDS A POLICY

Why send_file needs a policy

Sending a file modifies state by creating a new message/attachment in a chat, which is reversible (can be deleted). Without a description, we assume standard file-sending behavior rather than destructive or financial impact. However, the ability to send files at scale via automation to WhatsApp contacts poses medium risk: potential for spam, phishing, malware distribution, or unwanted bulk messaging.

From the tool's definition Tool name 'send_file' on a WhatsApp automation server. The name indicates file transmission capability. Description is empty, limiting evidence.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

send_file Rate-limited

send_file 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_file": {
      "limits": [
        {
          "counter": "send_file_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 MCP Automation, so you can run agents against it safely.

FAQ

Questions about send_file

What does the send_file tool do? +

send_file. It is categorised as a Write tool in the WhatsApp MCP Automation 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_file? +

Register the WhatsApp MCP Automation MCP server in PolicyLayer and add a rule for send_file: 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 MCP Automation. Nothing to install.

What risk level is send_file? +

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

Can I rate-limit send_file? +

Yes. Add a rate_limit block to the send_file 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_file completely? +

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

send_file is provided by the WhatsApp MCP Automation MCP server (priyasogani8-star/whatsapp-mcp-automation). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.