make_outbound_call

Initiates phone call with agent. Returns: call details. Use when: making automated calls via Twilio integration.

SERVERElevenLabs MCP Enhanced SOURCE199-mcp/mcp-elevenlabs

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade C, identity unverified Pull the record →

This record as markdown: /tools/199-mcp-mcp-elevenlabs/make-outbound-call.md

WHAT IT DOES

What make_outbound_call does on ElevenLabs MCP Enhanced

AI agents invoke make_outbound_call to trigger actions in ElevenLabs MCP Enhanced. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

RISK

Why make_outbound_call is rated High

This tool triggers an external real-world operation (a phone call) via Twilio integration. It's not purely data manipulation — it causes an external side effect (placing a phone call) that depends on the arguments provided.

From the tool's definition Initiates phone call with agent... making automated calls via Twilio integration

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs make_outbound_call safely

PolicyLayer is an MCP gateway: it sits between your AI agents and ElevenLabs MCP Enhanced, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For make_outbound_call, this is the rule to start with:

make_outbound_call Rate-limited

make_outbound_call stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "make_outbound_call": {
      "limits": [
        {
          "counter": "make_outbound_call_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect ElevenLabs MCP Enhanced, apply this rule, and every make_outbound_call call is checked against it from then on.

FAQ

Questions about make_outbound_call

What does the make_outbound_call tool do? +

Initiates phone call with agent. Returns: call details. Use when: making automated calls via Twilio integration. It is categorised as a Execute tool in the ElevenLabs MCP Enhanced MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on make_outbound_call? +

Register the ElevenLabs MCP Enhanced MCP server in PolicyLayer and add a rule for make_outbound_call: 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 ElevenLabs MCP Enhanced. Nothing to install.

What risk level is make_outbound_call? +

make_outbound_call is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit make_outbound_call? +

Yes. Add a rate_limit block to the make_outbound_call 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 make_outbound_call completely? +

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

make_outbound_call is provided by the ElevenLabs MCP Enhanced MCP server (199-mcp/mcp-elevenlabs). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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