copy_pattern

THE RISK

Medium Risk

Why copy_pattern needs a policy

This is a Write operation because it creates or modifies data reversibly. Duplicating a pattern piece adds new content to the project but does not irreversibly destroy anything. It is reversible (the copy can be deleted).

From the tool's definition The tool "copy_pattern" duplicates a pattern piece, which creates new data (a copy of an existing pattern) in the CLO3D project. The description explicitly states it duplicates a pattern, a reversible modification operation.

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

POLICY

How to control copy_pattern

PolicyLayer is an MCP gateway — it sits between your AI agents and CLO3D MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for copy_pattern:

policy.json

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

copy_pattern 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 CLO3D MCP Server — 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 →

Free to start. No card required.

EXPLORE

Related tools and policies

More CLO3D MCP Server tools

Destructive delete_pattern Delete a pattern piece from the project. Destructive new_project Create a new empty CLO3D project, clearing the current scene. Execute simulate Run cloth simulation for a number of steps. Execute open_file Open a file in CLO3D. Supports .zprj, .zpac, .avt, .obj, .fbx formats. Write add_fabric Add a new fabric to the project from a .zfab or .jfab file. Write assign_fabric_to_pattern Assign a fabric to a pattern piece. Write create_pattern Create a new pattern piece from vertex points. Write export_fbx Export the garment as an FBX file.

All 33 CLO3D MCP Server tools →

Write tools on other servers

M-Team MCP Server download_torrent YouTube MCP Server generate_video_title Android Forensics ADB MCP Server combine_reports 0xarchive web3_signup

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 copy_pattern

What does the copy_pattern tool do? +

Duplicate a pattern piece at a given position. It is categorised as a Write tool in the CLO3D 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 copy_pattern? +

Register the CLO3D MCP Server MCP server in PolicyLayer and add a rule for copy_pattern: 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 CLO3D MCP Server. Nothing to install.

What risk level is copy_pattern? +

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

Can I rate-limit copy_pattern? +

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

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

copy_pattern is provided by the CLO3D MCP Server MCP server (ubani-studio/clo3d-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every CLO3D MCP Server tool call.

Start from CLO3D MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →