audio_focus_previous_playlist

THE RISK

High Risk

Why audio_focus_previous_playlist needs a policy

This tool triggers an action in ProPresenter (changing focus to a different audio playlist), which constitutes an external operation with side effects on the running presentation software. It doesn't read data, write/create content, delete anything, or involve finances. It executes a UI/state change in the application.

From the tool's definition Focus the previous audio playlist

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

POLICY

How to control audio_focus_previous_playlist

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

policy.json

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

audio_focus_previous_playlist 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 Propresenter — 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 Propresenter tools

Destructive clear_layer Clear a specific layer (audio, props, messages, announcements, slide, media, video_input) Destructive messages_delete Delete a specific message Destructive props_clear Clear a specific prop from display Destructive props_delete Delete a specific prop Destructive props_delete_collection Delete a specific prop collection Destructive stage_delete_layout Delete a specific stage layout Execute clear_trigger_group Trigger a specific clear group Execute props_pause_auto_clear Pause auto-clear for a specific prop

All 177 Propresenter tools →

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Go deeper

High-risk tools in Propresenter → 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 audio_focus_previous_playlist

What does the audio_focus_previous_playlist tool do? +

Focus the previous audio playlist. It is categorised as a Execute tool in the Propresenter MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on audio_focus_previous_playlist? +

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

What risk level is audio_focus_previous_playlist? +

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

Can I rate-limit audio_focus_previous_playlist? +

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

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

audio_focus_previous_playlist is provided by the Propresenter MCP server (@alxpark/propresenter-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Propresenter tool call.

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

CHECK YOUR STACK →