playlists_focus_previous

THE RISK

High Risk

Why playlists_focus_previous needs a policy

This tool triggers an action in ProPresenter 7 — changing focus to the previous playlist — which is an external operation that affects the state of a live presentation software. It's not a simple data read, nor does it delete data, but it executes an operational command on an external system.

From the tool's definition Focus the previous playlist

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

POLICY

How to control playlists_focus_previous

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 playlists_focus_previous:

policy.json

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

playlists_focus_previous 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

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All 177 Propresenter tools →

Execute tools on other servers

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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 playlists_focus_previous

What does the playlists_focus_previous tool do? +

Focus the previous 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 playlists_focus_previous? +

Register the Propresenter MCP server in PolicyLayer and add a rule for playlists_focus_previous: 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 playlists_focus_previous? +

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

Can I rate-limit playlists_focus_previous? +

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

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

playlists_focus_previous 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 →