Play an audio file using the system's default audio player with optional volume control and file cleanup. Supports WAV and MP3 formats. Files must be in the temporary directory for security.
Part of the Local Voice MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
AI agents call play_audio to perform operations in Local Voice. While the risk category is not fully classified, applying a rate limit gives you visibility into how often the tool is called and prevents unexpected bursts of activity from autonomous agents.
Applying a policy to play_audio gives you an audit trail of every call an AI agent makes. Even for low-risk tools, visibility into agent behaviour helps you debug issues, optimise workflows, and maintain compliance with your organisation's security requirements.
Apply a rate limit to control usage and monitor for unexpected behaviour.
tools:
play_audio:
rules:
- action: allow
rate_limit:
max: 60
window: 60See the full Local Voice policy for all 3 tools.
Agents calling other-class tools like play_audio have been implicated in these attack patterns. Read the full case and prevention policy for each:
Other tools in the Other risk category across the catalogue. The same policy patterns (rate-limit, validate) apply to each.
Play an audio file using the system's default audio player with optional volume control and file cleanup. Supports WAV and MP3 formats. Files must be in the temporary directory for security.. It is categorised as a Other tool in the Local Voice MCP Server, which means it performs auxiliary operations.
Add a rule in your Intercept YAML policy under the tools section for play_audio. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Local Voice MCP server.
play_audio is a Other tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the play_audio rule in your Intercept 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.
Set action: deny in the Intercept policy for play_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.
play_audio is provided by the Local Voice MCP server (@codecraftersllc/local-voice-mcp). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Open source. One binary. Zero dependencies.
npx -y @policylayer/intercept