stop_replay_buffer

THE RISK

High Risk

This tool executes a command that halts an ongoing operation (replay buffer) in OBS Studio. While not destructive (the buffer can be restarted), it does affect the state of a running system and constitutes an action with external effects. It does not retrieve data (Read), create/modify persistent data reversibly (Write), or involve financial transactions.

From the tool's definition The tool 'stop_replay_buffer' stops the replay buffer output in OBS Studio. This is an active operation that triggers a state change in an external system (OBS), controlling media recording/playback functionality.

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

HOW TO CONTROL STOP_REPLAY_BUFFER

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

policy.json

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

stop_replay_buffer 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 OBS MCP Server — 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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High-risk tools in OBS MCP Server → 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.
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FAQ

What does the stop_replay_buffer tool do? +

Stops the replay buffer output. It is categorised as a Execute tool in the OBS MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on stop_replay_buffer? +

Register the OBS MCP Server MCP server in PolicyLayer and add a rule for stop_replay_buffer: 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 OBS MCP Server. Nothing to install.

What risk level is stop_replay_buffer? +

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

Can I rate-limit stop_replay_buffer? +

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

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

stop_replay_buffer is provided by the OBS MCP Server MCP server (royshil/obs-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every OBS MCP Server tool call.

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// WHAT STOP_REPLAY_BUFFER ON OBS MCP SERVER DOES

// THE RISK

// HOW TO CONTROL STOP_REPLAY_BUFFER

// EXPLORE