modify_element

A write tool on the Revit MCP server.

SERVERRevit MCP Server SOURCEdemolinator/revit-mcp-server

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/demolinator-revit-mcp-server/modify-element.md

WHAT IT DOES

What modify_element does on Revit MCP Server

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

RISK

Why modify_element is rated Medium

The name 'modify_element' strongly implies updating or changing a Revit model element, which is a Write operation. In Revit, modifying elements changes the BIM model data. The description is empty, lowering confidence. Severity is high because modifying building model elements could have significant downstream consequences (structural integrity, coordination, documentation).

From the tool's definition Tool name 'modify_element' in the context of a Revit MCP server with tools for 'building design, editing, analysis'

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs modify_element safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Revit MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For modify_element, this is the rule to start with:

modify_element Rate-limited

modify_element 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": {
    "modify_element": {
      "limits": [
        {
          "counter": "modify_element_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Revit MCP Server, apply this rule, and every modify_element call is checked against it from then on.

FAQ

Questions about modify_element

What does the modify_element tool do? +

modify_element is a write tool on the Revit MCP Server MCP server. It is categorised as a Write tool in the Revit 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 modify_element? +

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

What risk level is modify_element? +

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

Can I rate-limit modify_element? +

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

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

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

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