focus_previous_presentation

THE RISK

High Risk

Why focus_previous_presentation needs a policy

This tool triggers a navigation action in ProPresenter 7, switching focus to the previous presentation. It is an external operation that changes the state of a live presentation application, qualifying as Execute. Misuse could disrupt a live event by changing the active presentation unexpectedly.

From the tool's definition Focus the previous presentation

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

POLICY

How to control focus_previous_presentation

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 focus_previous_presentation:

policy.json

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

focus_previous_presentation 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

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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 focus_previous_presentation

What does the focus_previous_presentation tool do? +

Focus the previous presentation. 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 focus_previous_presentation? +

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

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

Can I rate-limit focus_previous_presentation? +

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

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

focus_previous_presentation 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 →