gh_data_tree_set

Push a DataTree into a component input.

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/gh-data-tree-set.md

WHAT IT DOES

What gh_data_tree_set does on Rhino

AI agents use gh_data_tree_set 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 gh_data_tree_set is rated Medium

This tool writes data (a DataTree) into a Grasshopper component's input, modifying the state of the Grasshopper document. It is reversible (the value can be changed or cleared), so Write is the appropriate category rather than Destructive. Misuse could corrupt a Grasshopper graph's data flow but is generally recoverable.

From the tool's definition 'Push a DataTree into a component input' — sets/writes data to a component's input parameter in Grasshopper

Attacks that exploit this kind of access

RECOMMENDED RULE

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

gh_data_tree_set Rate-limited

gh_data_tree_set 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": {
    "gh_data_tree_set": {
      "limits": [
        {
          "counter": "gh_data_tree_set_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 gh_data_tree_set call is checked against it from then on.

FAQ

Questions about gh_data_tree_set

What does the gh_data_tree_set tool do? +

Push a DataTree into a component input. 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 gh_data_tree_set? +

Register the Rhino MCP server in PolicyLayer and add a rule for gh_data_tree_set: 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 gh_data_tree_set? +

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

Can I rate-limit gh_data_tree_set? +

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

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

gh_data_tree_set 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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