entity_create_spline

Create a NURBS spline curve passing through the specified fit points.

SERVERAutoCAD MCP Pro SOURCEu-c4n/autocad-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/u-c4n-autocad-mcp/entity-create-spline.md

WHAT IT DOES

What entity_create_spline does on AutoCAD MCP Pro

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

RISK

Why entity_create_spline is rated Medium

This tool creates new drawing objects (spline entities), modifying the CAD document state. It is Write rather than Execute because it performs a specific, bounded geometric operation (spline creation) rather than executing arbitrary code. It is not Destructive because spline creation is reversible (can be undone/deleted).

From the tool's definition Tool name 'entity_create_spline' and description 'Create a NURBS spline curve passing through the specified fit points' indicate irreversible creation of new geometric entities in a CAD drawing.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs entity_create_spline safely

PolicyLayer is an MCP gateway: it sits between your AI agents and AutoCAD MCP Pro, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For entity_create_spline, this is the rule to start with:

entity_create_spline Rate-limited

entity_create_spline 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": {
    "entity_create_spline": {
      "limits": [
        {
          "counter": "entity_create_spline_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect AutoCAD MCP Pro, apply this rule, and every entity_create_spline call is checked against it from then on.

FAQ

Questions about entity_create_spline

What does the entity_create_spline tool do? +

Create a NURBS spline curve passing through the specified fit points. It is categorised as a Write tool in the AutoCAD MCP Pro MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on entity_create_spline? +

Register the AutoCAD MCP Pro MCP server in PolicyLayer and add a rule for entity_create_spline: 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 AutoCAD MCP Pro. Nothing to install.

What risk level is entity_create_spline? +

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

Can I rate-limit entity_create_spline? +

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

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

entity_create_spline is provided by the AutoCAD MCP Pro MCP server (u-c4n/autocad-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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