replace_fabric

THE RISK

Medium Risk

Why replace_fabric needs a policy

This tool modifies existing design data (fabric assignment) by substituting one fabric for another, making it a Write operation. It is not Destructive because replacement is typically reversible in design software; not Execute because it does not run code or scripts based on user input; not Financial or Read.

From the tool's definition Tool performs 'Replace an existing fabric with a new one from file' — a reversible modification operation that alters fabric properties in a CLO3D design without permanently deleting or destroying content.

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

POLICY

How to control replace_fabric

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 replace_fabric:

policy.json

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

replace_fabric 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 copy_pattern Duplicate a pattern piece at a given position. Write create_pattern Create a new pattern piece from vertex points.

All 33 CLO3D MCP Server tools →

Write tools on other servers

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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 replace_fabric

What does the replace_fabric tool do? +

Replace an existing fabric with a new one from file. 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 replace_fabric? +

Register the CLO3D MCP Server MCP server in PolicyLayer and add a rule for replace_fabric: 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 replace_fabric? +

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

Can I rate-limit replace_fabric? +

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

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

replace_fabric 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 →