This record as markdown: /tools/easehee-rhino-mcp/rhino-array-rectangular.md
What rhino_array_rectangular does on Rhino
AI agents use rhino_array_rectangular 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_array_rectangular is rated Medium
The tool creates multiple copies of objects in a rectangular pattern, which is a reversible modification operation (objects can be deleted or undo used). This is a Write action—it adds data to the Rhino model without destroying existing content.
From the tool's definition Tool name 'rhino_array_rectangular' and description 'Array objects in a 3D rectangular grid' indicate creation of new geometric objects through duplication/arraying, which modifies the Rhino model state by adding new elements.
Attacks that exploit this kind of access
The rule that runs rhino_array_rectangular 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_array_rectangular, this is the rule to start with:
rhino_array_rectangular 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_array_rectangular call is checked against it from then on.
Questions about rhino_array_rectangular
Array objects in a 3D rectangular grid. 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_array_rectangular: 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_array_rectangular 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_array_rectangular 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_array_rectangular. 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_array_rectangular 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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