add_seam · Clo3d MCP: Risk & Policy

WHAT IT DOES

What add_seam does on Clo3d

AI agents use add_seam to create or update resources in Clo3d — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Clo3d environment.

WHY IT NEEDS A POLICY

Why add_seam needs a policy

The tool creates or modifies garment design data (connecting pattern outlines) without irreversibly destroying information. While it affects the garment structure, the change is reversible—seams can be removed or adjusted. This fits the Write category (creates/modifies data reversibly).

From the tool's definition Tool description states it will 'Sew outline line_a of pattern_a to outline line_b of pattern_b,' which modifies the garment design by joining pattern pieces together. This is a reversible change to the CLO3D project data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_seam Rate-limited

add_seam 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": {
    "add_seam": {
      "limits": [
        {
          "counter": "add_seam_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Clo3d, so you can run agents against it safely.

FAQ

Questions about add_seam

What does the add_seam tool do? +

Sew outline line_a of pattern_a to outline line_b of pattern_b. It is categorised as a Write tool in the Clo3d MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add_seam? +

Register the Clo3d MCP server in PolicyLayer and add a rule for add_seam: 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. Nothing to install.

What risk level is add_seam? +

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

Can I rate-limit add_seam? +

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

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

add_seam is provided by the Clo3d MCP server (lilbonner/clo3d-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.