curve_create_circle
Create a circle curve (useful as bevel object for tubes/pipes).
This record as markdown: /tools/dwgx-blender-copilot/curve-create-circle.md
What curve_create_circle does on Blender Copilot MCP Server
AI agents use curve_create_circle to create or update resources in Blender Copilot MCP Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Blender Copilot MCP Server environment.
Why curve_create_circle is rated Medium
The tool creates a new curve object in Blender, which is a Write operation: it modifies scene state by adding geometry. This is reversible (undo-able in Blender) and has no destructive characteristics. The blast radius is medium because unintended curve creation could pollute a scene and require cleanup, but the operation is easily undone and affects only local scene state.
From the tool's definition curve_create_circle: Create a circle curve (useful as bevel object for tubes/pipes) — creates new geometry in the Blender scene via a reversible operation.
Attacks that exploit this kind of access
The rule that runs curve_create_circle safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Blender Copilot MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For curve_create_circle, this is the rule to start with:
curve_create_circle 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.
The button opens the PolicyLayer dashboard: create your workspace, connect Blender Copilot MCP Server, apply this rule, and every curve_create_circle call is checked against it from then on.
Questions about curve_create_circle
Create a circle curve (useful as bevel object for tubes/pipes). It is categorised as a Write tool in the Blender Copilot MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Blender Copilot MCP Server MCP server in PolicyLayer and add a rule for curve_create_circle: 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 Blender Copilot MCP Server. Nothing to install.
curve_create_circle 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 curve_create_circle 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 curve_create_circle. 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.
curve_create_circle is provided by the Blender Copilot MCP Server MCP server (dwgx/blender-copilot). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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