unity_selection_set

Set the editor selection to specific GameObjects.

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-selection-set.md

WHAT IT DOES

What unity_selection_set does on Unity MCP Server

AI agents use unity_selection_set 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_selection_set is rated Medium

This tool modifies the Unity Editor's current selection state by setting it to specific GameObjects. It changes editor state (what is selected) but does not delete, execute code, or move money. The effect is reversible (selection can be changed again), making it a Write operation.

From the tool's definition Set the editor selection to specific GameObjects

Attacks that exploit this kind of access

RECOMMENDED RULE

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

unity_selection_set Rate-limited

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

FAQ

Questions about unity_selection_set

What does the unity_selection_set tool do? +

Set the editor selection to specific GameObjects. 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_selection_set? +

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

What risk level is unity_selection_set? +

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

Can I rate-limit unity_selection_set? +

Yes. Add a rate_limit block to the unity_selection_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 unity_selection_set completely? +

Set action: deny in the PolicyLayer policy for unity_selection_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 unity_selection_set? +

unity_selection_set 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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