send_image · PyWA MCP Server MCP: Risk & Policy

WHAT IT DOES

What send_image does on PyWA MCP Server

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

WHY IT NEEDS A POLICY

Why send_image needs a policy

This tool transmits image media to WhatsApp users, which is a Write operation (creates/sends data with reversible effects—images can be viewed but not modified on the sender's side, and WhatsApp records message history). It is not Destructive (not deleting data), not Execute (not running arbitrary code), not Financial.

From the tool's definition Tool name 'send_image' combined with server context describing WhatsApp Business API for 'sending messages, media' indicates this tool creates/transmits data (image media) to WhatsApp contacts.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

send_image Rate-limited

send_image 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_image": {
      "limits": [
        {
          "counter": "send_image_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 PyWA MCP Server, so you can run agents against it safely.

FAQ

Questions about send_image

What does the send_image tool do? +

send_image. It is categorised as a Write tool in the PyWA 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 send_image? +

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

What risk level is send_image? +

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

Can I rate-limit send_image? +

Yes. Add a rate_limit block to the send_image 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_image completely? +

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

send_image is provided by the PyWA MCP Server MCP server (jem-hr/pywa-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.