unity_component_set_reference

Wire an object reference on a component property. Resolves by asset path, scene GameObject name, component type, or instance ID (richer than set_property for ObjectReference fields).

SERVERUnity MCP Server SOURCEanklebreaker-studio/unity-mcp-server

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/anklebreaker-studio-unity-mcp-server/unity-component-set-reference.md

WHAT IT DOES

What unity_component_set_reference does on Unity MCP Server

AI agents use unity_component_set_reference to create or update resources in Unity MCP Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Unity MCP Server environment.

RISK

Why unity_component_set_reference is rated Medium

This tool modifies component properties by assigning object references, which is a write operation (creates/modifies data reversibly). It does not irreversibly delete data (not Destructive), does not execute arbitrary code or scripts (not Execute), and does not move money (not Financial).

From the tool's definition 'Wire an object reference on a component property' indicates modification of component properties through reference assignment. The tool explicitly performs wiring operations that modify component state, which is a reversible write operation.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs unity_component_set_reference safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Unity MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For unity_component_set_reference, this is the rule to start with:

unity_component_set_reference Rate-limited

unity_component_set_reference 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": {
    "unity_component_set_reference": {
      "limits": [
        {
          "counter": "unity_component_set_reference_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 Unity MCP Server, apply this rule, and every unity_component_set_reference call is checked against it from then on.

FAQ

Questions about unity_component_set_reference

What does the unity_component_set_reference tool do? +

Wire an object reference on a component property. Resolves by asset path, scene GameObject name, component type, or instance ID (richer than set_property for ObjectReference fields). It is categorised as a Write tool in the Unity MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on unity_component_set_reference? +

Register the Unity MCP Server MCP server in PolicyLayer and add a rule for unity_component_set_reference: 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 Unity MCP Server. Nothing to install.

What risk level is unity_component_set_reference? +

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

Can I rate-limit unity_component_set_reference? +

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

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

unity_component_set_reference is provided by the Unity MCP Server MCP server (anklebreaker-studio/unity-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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