open_voice_panel · Pronunciation & Voice Coach MCP

WHAT IT DOES

What open_voice_panel does on Pronunciation & Voice Coach

AI agents invoke open_voice_panel to trigger actions in Pronunciation & Voice Coach. 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.

WHY IT NEEDS A POLICY

Why open_voice_panel needs a policy

This tool triggers an action (opening a UI panel) in the client application, which constitutes executing an external operation. It doesn't read, write, or delete data, but it does cause a side effect by launching/displaying a UI component. Severity is low as the blast radius of misuse is minimal — it only opens a panel.

From the tool's definition 'Open the MCP Apps voice panel' — triggers an external UI operation in the client environment

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

open_voice_panel Rate-limited

open_voice_panel 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": {
    "open_voice_panel": {
      "limits": [
        {
          "counter": "open_voice_panel_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Pronunciation & Voice Coach, so you can run agents against it safely.

FAQ

Questions about open_voice_panel

What does the open_voice_panel tool do? +

Open the MCP Apps voice panel when the client supports embedded UI. It is categorised as a Execute tool in the Pronunciation & Voice Coach MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on open_voice_panel? +

Register the Pronunciation & Voice Coach MCP server in PolicyLayer and add a rule for open_voice_panel: 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 Pronunciation & Voice Coach. Nothing to install.

What risk level is open_voice_panel? +

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

Can I rate-limit open_voice_panel? +

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

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

open_voice_panel is provided by the Pronunciation & Voice Coach MCP server (pypi:mcp-server-pronunciation). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.