speak

THE RISK

Low Risk

Why speak needs a policy

With no description, we can only infer from the name 'speak' and server context (voice calls). It likely sends audio/speech output over a call, which would be a Write/Execute action, but without confirmation we cannot be certain. Confidence is low due to missing description.

From the tool's definition Tool description is empty and uninformative; only the name 'speak' is available.

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

POLICY

How to control speak

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "speak": {
      "limits": [
        {
          "counter": "speak_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

speak gets a rate cap, and everything else on the server is denied unless you say otherwise.

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

SET A RULE FOR THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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All 12 Ringback tools →

Other 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.
Tool risk categories → How PolicyLayer classifies MCP tools by what they can do.
MCP tool → What an MCP tool is and how clients discover and call it.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about speak

What does the speak tool do? +

speak. It is categorised as a Other tool in the Ringback MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on speak? +

Register the Ringback MCP server in PolicyLayer and add a rule for speak: 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 Ringback. Nothing to install.

What risk level is speak? +

speak is a Other tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit speak? +

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

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

speak is provided by the Ringback MCP server (mohitbadwal/ringback). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Ringback tool call.

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

CHECK YOUR STACK →