clear_colors

THE RISK

Critical Risk

Why clear_colors needs a policy

The name 'clear_colors' strongly implies removing or resetting color overrides in a Revit model, which is a modification action. Given the sibling tool 'color_splash' (which likely applies colors), 'clear_colors' is the inverse — removing applied colors. This could be reversible (Write) or irreversible (Destructive) depending on implementation.

From the tool's definition Tool name 'clear_colors' on a server that 'manipulates Autodesk Revit models'; description is empty and uninformative.

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

POLICY

How to control clear_colors

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 clear_colors:

policy.json

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

clear_colors 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

More MCP server for Revit - Python tools

Destructive close_document Close the active Revit document. Args: save: If True, save the docume Execute execute_revit_code execute_revit_code Execute launch_revit launch_revit Write place_family Place a family instance at a specified location in the Revit model Write sync_with_central Synchronize the active workshared document with central. Only works with workshar Write open_document Open a Revit document file in the running Revit instance. Supports workshared (ce Write save_document Save the active Revit document. If file_path is omitted, saves the document in pl Other color_splash color_splash

All 20 MCP server for Revit - Python tools →

Destructive tools on other servers

Android Forensics ADB MCP Server create_full_backup 0xarchive web3_revoke_key Frida Game Hacking MCP clear_scan cPanel MCP Server clear_spam_box

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 clear_colors

What does the clear_colors tool do? +

clear_colors. 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 clear_colors? +

Register the MCP server for Revit - Python MCP server in PolicyLayer and add a rule for clear_colors: 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 clear_colors? +

clear_colors 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 clear_colors? +

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

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

clear_colors 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 →