AI agents use create_pattern to create or update resources in CLO3D MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your CLO3D MCP Server environment.
This tool creates new pattern data within a CLO3D design project. While creation is reversible (patterns can be deleted via the sibling delete_pattern tool), it modifies project state and could lead to unintended design changes if an AI agent misuses vertex point arguments. It does not execute arbitrary code, trigger external systems, or cause irreversible damage—hence Write rather than Execute or Destructive.
From the tool's definition Tool description states 'Create a new pattern piece' — a create operation that modifies the CLO3D project by adding new data structures (pattern pieces) that are reversible through deletion.
Documented attack patterns abuse exactly the kind of access create_pattern gives an agent:
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 create_pattern:
{
"version": "1",
"default": "deny",
"tools": {
"create_pattern": {
"limits": [
{
"counter": "create_pattern_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_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.
Free to start. No card required.
Create a new pattern piece from vertex points. 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.
Register the CLO3D MCP Server MCP server in PolicyLayer and add a rule for create_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.
create_pattern is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the create_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.
Set action: deny in the PolicyLayer policy for create_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.
create_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.
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.
Free to start. No card required.
33 CLO3D MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.