send_audio

THE RISK

Medium Risk

Why send_audio needs a policy

This tool creates a new message (audio content) in WhatsApp, a real-world communication platform. This is a reversible write action (messages can be deleted). It is not Read (it modifies state), not Destructive (deletion is separate), not Financial (no money movement), and not Execute (it doesn't run arbitrary code—it sends a predetermined message type).

From the tool's definition send_audio: Send an audio message via WhatsApp — creates/transmits a new message artifact in an external communication system (WhatsApp).

Documented attack patterns abuse exactly the kind of access send_audio gives an agent:

POLICY

How to control send_audio

PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Ap2, and nothing reaches the server without passing your rules. This is the rule we recommend for send_audio:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "send_audio": {
      "limits": [
        {
          "counter": "send_audio_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

send_audio 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.

Create a free account and register Mcp Ap2 — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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All 1300 Mcp Ap2 tools →

Write tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about send_audio

What does the send_audio tool do? +

Send an audio message via WhatsApp. It is categorised as a Write tool in the Mcp Ap2 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_audio? +

Register the Mcp Ap2 MCP server in PolicyLayer and add a rule for send_audio: 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 Mcp Ap2. Nothing to install.

What risk level is send_audio? +

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

Can I rate-limit send_audio? +

Yes. Add a rate_limit block to the send_audio 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_audio completely? +

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

send_audio is provided by the Mcp Ap2 MCP server (@codespar/mcp-ap2). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Mcp Ap2 tool call.

Start from Mcp Ap2, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →