tag_all_rooms

THE RISK

Medium Risk

Why tag_all_rooms needs a policy

This tool creates new annotation elements (tags) in the Revit model, which is a reversible write operation. While it modifies the project by adding visual elements, these additions can be undone/deleted without permanent data loss. It does not execute arbitrary code, delete elements irreversibly, or affect financial systems.

From the tool's definition Tool creates tags for all rooms in the current view, placing them at center points with room name and number displayed. The verb 'create' and action of 'placing' tags indicates data creation and modification of the model.

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

POLICY

How to control tag_all_rooms

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

policy.json

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

tag_all_rooms 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.

Create a free account and register Revit MCP — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

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EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about tag_all_rooms

What does the tag_all_rooms tool do? +

Create tags for all rooms in the current active view. Tags will be placed at the center point of each room, displaying the room name and number. It is categorised as a Write tool in the Revit MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on tag_all_rooms? +

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

What risk level is tag_all_rooms? +

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

Can I rate-limit tag_all_rooms? +

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

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

tag_all_rooms is provided by the Revit MCP server (mcp-servers-for-revit/revit-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Revit MCP tool call.

Start from Revit MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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