duplicate_room · Portals MCP: Risk & Policy

WHAT IT DOES

What duplicate_room does on Portals

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

PARAMETERS

Parameter	Type	Required	Description
`roomId`	string	—	Room ID to duplicate. Falls back to PORTALS_ROOM_ID env variable if omitted.

Parameters from the server's own tool schema.

WHY IT NEEDS A POLICY

Why duplicate_room needs a policy

This tool creates a new room by copying an existing one, which is a reversible write/create operation. It does not delete or overwrite data, execute arbitrary code, or involve financial transactions. The blast radius is medium since it could create large duplicate resources, but it is not irreversible.

From the tool's definition Duplicate an existing room. Creates a copy with all items, settings, tasks, and quests. Returns the new room ID.

Risk signalsBulk/mass operation — affects multiple targets

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

duplicate_room Rate-limited

duplicate_room 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "duplicate_room": {
      "limits": [
        {
          "counter": "duplicate_room_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Portals, so you can run agents against it safely.

FAQ

Questions about duplicate_room

What does the duplicate_room tool do? +

Duplicate an existing room. Creates a copy with all items, settings, tasks, and quests. Returns the new room ID. It is categorised as a Write tool in the Portals MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does duplicate_room accept? +

duplicate_room accepts 1 parameter: roomId. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on duplicate_room? +

Register the Portals MCP server in PolicyLayer and add a rule for duplicate_room: 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 Portals. Nothing to install.

What risk level is duplicate_room? +

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

Can I rate-limit duplicate_room? +

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

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

duplicate_room is provided by the Portals MCP server (portals-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.