assign_fabric_to_pattern

THE RISK

Medium Risk

Why assign_fabric_to_pattern needs a policy

The tool creates or modifies design data (assigning fabric properties to patterns) in a reversible manner. This is a Write operation because the change can be undone by reassigning a different fabric or restoring a prior state. While CLO3D is a design tool, the action itself does not execute external code, run simulations (that would be Execute), or irreversibly delete assets (that would be Destructive).

From the tool's definition Tool description states 'Assign a fabric to a pattern piece' — this modifies an existing pattern by applying a fabric attribute, altering the design reversibly without deleting data or triggering external financial/execution consequences.

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

POLICY

How to control assign_fabric_to_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 assign_fabric_to_pattern:

policy.json

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

assign_fabric_to_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 copy_pattern Duplicate a pattern piece at a given position. 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 →

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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 assign_fabric_to_pattern

What does the assign_fabric_to_pattern tool do? +

Assign a fabric to a pattern piece. 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 assign_fabric_to_pattern? +

Register the CLO3D MCP Server MCP server in PolicyLayer and add a rule for assign_fabric_to_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 assign_fabric_to_pattern? +

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

Can I rate-limit assign_fabric_to_pattern? +

Yes. Add a rate_limit block to the assign_fabric_to_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 assign_fabric_to_pattern completely? +

Set action: deny in the PolicyLayer policy for assign_fabric_to_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 assign_fabric_to_pattern? +

assign_fabric_to_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 →