close_document

THE RISK

Critical Risk

Why close_document needs a policy

Closing a document without saving permanently discards any unsaved work. Even with save=True, the action of closing the active document is irreversible in terms of the working session. The default behavior (save=False) means unsaved changes are lost permanently, making this Destructive. High severity because an AI agent misusing this could cause loss of significant engineering/design work in a Revit model.

From the tool's definition 'Close the active Revit document' with 'If False (default), close without saving' — default behavior discards unsaved changes irreversibly

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

POLICY

How to control close_document

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

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "close_document"
  ]
}

close_document disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.

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

RESTRICT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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All 20 MCP server for Revit - Python tools →

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Go deeper

Critical-risk tools in MCP server for Revit - Python → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Blast radius → How much damage one compromised or confused agent can do — and how to bound it.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about close_document

What does the close_document tool do? +

Close the active Revit document. Args: save: If True, save the document before closing. If False (default), close without saving. It is categorised as a Destructive tool in the MCP server for Revit - Python MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on close_document? +

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

What risk level is close_document? +

close_document is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit close_document? +

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

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

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

Enforce policy on every MCP server for Revit - Python tool call.

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

CHECK YOUR STACK →