rhino_hatch

Add a hatch over the given closed curves.

SERVERRhino SOURCEeasehee/rhino-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/easehee-rhino-mcp/rhino-hatch.md

WHAT IT DOES

What rhino_hatch does on Rhino

AI agents use rhino_hatch 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.

RISK

Why rhino_hatch is rated Medium

This tool creates new graphical elements (hatches) in the Rhino 3D model, which is a modification operation. It does not delete, execute arbitrary code, move financial resources, or perform irreversible destructive actions. The operation is reversible (hatches can be deleted), making it a Write-category tool.

From the tool's definition Tool name 'rhino_hatch' and description 'Add a hatch over the given closed curves' indicate the tool creates or adds a new graphical element (hatch pattern) to a Rhino model.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs rhino_hatch 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_hatch, this is the rule to start with:

rhino_hatch Rate-limited

rhino_hatch 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": {
    "rhino_hatch": {
      "limits": [
        {
          "counter": "rhino_hatch_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 Rhino, apply this rule, and every rhino_hatch call is checked against it from then on.

FAQ

Questions about rhino_hatch

What does the rhino_hatch tool do? +

Add a hatch over the given closed curves. 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.

How do I enforce a policy on rhino_hatch? +

Register the Rhino MCP server in PolicyLayer and add a rule for rhino_hatch: 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.

What risk level is rhino_hatch? +

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

Can I rate-limit rhino_hatch? +

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

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

rhino_hatch 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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