Medium Risk

set_scene_item_index

Sets the index position of a scene item in a scene. Args: scene_name: Name of the scene the item is in scene_item_id: ID of the scene item index: New index position for the scene item

How to control set_scene_item_index ↓

AI agents use set_scene_item_index to create or update resources in OBS MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your OBS MCP Server environment.

Medium Risk

This tool modifies the order/arrangement of scene items, which is a reversible change to OBS scene configuration. It does not delete, execute arbitrary code, execute shell commands, or move money. While it alters state, the change can be undone by setting a different index.

From the tool's definition Tool description states 'Sets the index position of a scene item in a scene' with parameters for scene_name, scene_item_id, and index.

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

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 set_scene_item_index:

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "set_scene_item_index": {
      "limits": [
        {
          "counter": "set_scene_item_index_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

set_scene_item_index stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

  1. Create a free account and register OBS MCP Server — nothing to install.
  2. Add this policy — paste it, or build it visually.
  3. Point your MCP client (Claude, Cursor, anything) at your gateway URL.
LIMIT THIS TOOL →

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Go deeper

What does the set_scene_item_index tool do? +

Sets the index position of a scene item in a scene. Args: scene_name: Name of the scene the item is in scene_item_id: ID of the scene item index: New index position for the scene item. It is categorised as a Write tool in the OBS MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on set_scene_item_index? +

Register the OBS MCP Server MCP server in PolicyLayer and add a rule for set_scene_item_index: 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 set_scene_item_index? +

set_scene_item_index is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit set_scene_item_index? +

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

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

set_scene_item_index 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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200 OBS MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.

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