transport_play

Play the specified layer (presentation, announcement, or audio)

SERVERPropresenter SOURCE@alxpark/propresenter-mcp

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-alxpark-propresenter-mcp/transport-play.md

WHAT IT DOES

What transport_play does on Propresenter

AI agents invoke transport_play to trigger actions in Propresenter. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

RISK

Why transport_play is rated High

This tool triggers playback of a media layer in ProPresenter 7, which is an external operation that causes observable effects (starting audio/video/presentation playback). It fits the Execute category as it triggers an external operation whose effects depend on the layer argument. Severity is medium since misuse could cause unintended content to play publicly during a live event.

From the tool's definition Play the specified layer (presentation, announcement, or audio)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs transport_play safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Propresenter, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For transport_play, this is the rule to start with:

transport_play Rate-limited

transport_play 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.

View as policy code

policy.json

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

RATE-LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Propresenter, apply this rule, and every transport_play call is checked against it from then on.

FAQ

Questions about transport_play

What does the transport_play tool do? +

Play the specified layer (presentation, announcement, or audio). 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 transport_play? +

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

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

Can I rate-limit transport_play? +

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

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

transport_play 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.

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