whisper_install

THE RISK

High Risk

Why whisper_install needs a policy

Installation tools execute system-level operations to download and install software packages. Given the context of a Voice Mode MCP server with a sibling tool 'get_whisper_version' and 'kokoro_install', this likely installs the Whisper ASR model/library onto the system. Installing software is an Execute-category action with high severity due to the potential for arbitrary code execution and system modification.

From the tool's definition Tool name 'whisper_install' implies installing software (Whisper speech recognition); description is empty and uninformative.

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

POLICY

How to control whisper_install

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

policy.json

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

whisper_install 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.

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

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Voice Mode tools

Destructive kokoro_uninstall Uninstall kokoro-fastapi and optionally remove models and data. This tool will: Destructive voice_statistics_reset Reset all voice conversation statistics and start a new session. Clears all track Destructive whisper_uninstall Uninstall whisper.cpp and optionally remove models and data. This tool will: Execute config_reload Reload configuration from .voicemode.env files and clear all caches. This tool re Execute kokoro_install kokoro_install Execute whisper_model_install whisper_model_install Write refresh_provider_registry Manually refresh health checks for voice provider endpoints. Useful when a servic Write update_config Update a configuration value in the voicemode.env file. Args: key: The co

All 25 Voice Mode tools →

Execute tools on other servers

Android Forensics ADB MCP Server adb_shell_command EMBA-MCP run_emba_scan Frida Game Hacking MCP remove_breakpoint Procmon request_elevation

Go deeper

High-risk tools in Voice Mode → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about whisper_install

What does the whisper_install tool do? +

whisper_install. It is categorised as a Execute tool in the Voice Mode MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on whisper_install? +

Register the Voice Mode MCP server in PolicyLayer and add a rule for whisper_install: 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 Voice Mode. Nothing to install.

What risk level is whisper_install? +

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

Can I rate-limit whisper_install? +

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

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

whisper_install is provided by the Voice Mode MCP server (mbailey/voicemode). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Voice Mode tool call.

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

CHECK YOUR STACK →