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What rhino_make2d does on Rhino
AI agents use rhino_make2d to create or update resources in Rhino, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Rhino environment.
Why rhino_make2d is rated Medium
This tool creates new 2D drawing geometry derived from existing 3D objects. It is a write/creation operation — it produces new geometry in the Rhino document — but does not delete or irreversibly alter the source objects. Misuse could clutter a document with unwanted geometry, but effects are reversible (the created objects can be deleted).
From the tool's definition Generate a 2D drawing projection of 3D objects
Attacks that exploit this kind of access
The rule that runs rhino_make2d safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Rhino, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For rhino_make2d, this is the rule to start with:
rhino_make2d 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 Rhino, apply this rule, and every rhino_make2d call is checked against it from then on.
Questions about rhino_make2d
Generate a 2D drawing projection of 3D objects. It is categorised as a Write tool in the Rhino MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Rhino MCP server in PolicyLayer and add a rule for rhino_make2d: 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 Rhino. Nothing to install.
rhino_make2d 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 rhino_make2d 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 rhino_make2d. 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.
rhino_make2d is provided by the Rhino MCP server (easehee/rhino-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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