send_media · Evolution API WhatsApp MCP Server MCP

WHAT IT DOES

What send_media does on Evolution API WhatsApp MCP Server

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

WHY IT NEEDS A POLICY

Why send_media needs a policy

This tool modifies state by creating new WhatsApp messages/media transmissions, making it a Write operation rather than Read (which would only retrieve data). It is not Execute because it does not run arbitrary code or trigger conditional external logic—it simply sends pre-prepared media. It is not Destructive, Financial, or Execute.

From the tool's definition Tool description states 'Send media (image, video, audio, document)' which creates/modifies state by transmitting content through WhatsApp Business messaging.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

send_media Rate-limited

send_media 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_media": {
      "limits": [
        {
          "counter": "send_media_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 Evolution API WhatsApp MCP Server, so you can run agents against it safely.

FAQ

Questions about send_media

What does the send_media tool do? +

Send media (image, video, audio, document). It is categorised as a Write tool in the Evolution API WhatsApp 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_media? +

Register the Evolution API WhatsApp MCP Server MCP server in PolicyLayer and add a rule for send_media: 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 Evolution API WhatsApp MCP Server. Nothing to install.

What risk level is send_media? +

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

Can I rate-limit send_media? +

Yes. Add a rate_limit block to the send_media 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_media completely? +

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

send_media is provided by the Evolution API WhatsApp MCP Server MCP server (luiso2/mcp-evolution-api). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.