unity_playerprefs_set

Set a PlayerPrefs value. Specify type: string (default), int, float.

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-playerprefs-set.md

WHAT IT DOES

What unity_playerprefs_set does on Unity MCP Server

AI agents use unity_playerprefs_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_playerprefs_set is rated Medium

This tool creates or modifies data in Unity's PlayerPrefs storage, which persists across application sessions. While reversible (values can be overwritten or cleared), it alters runtime state and application configuration. The impact is localized to the game/application instance rather than system-wide or irreversible, making it Write rather than Destructive.

From the tool's definition Tool description states "Set a PlayerPrefs value" with support for string, int, and float types. PlayerPrefs is Unity's persistent key-value storage mechanism that modifies application preferences and runtime state.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

unity_playerprefs_set Rate-limited

unity_playerprefs_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_playerprefs_set": {
      "limits": [
        {
          "counter": "unity_playerprefs_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_playerprefs_set call is checked against it from then on.

FAQ

Questions about unity_playerprefs_set

What does the unity_playerprefs_set tool do? +

Set a PlayerPrefs value. Specify type: string (default), int, float. 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_playerprefs_set? +

Register the Unity MCP Server MCP server in PolicyLayer and add a rule for unity_playerprefs_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_playerprefs_set? +

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

Can I rate-limit unity_playerprefs_set? +

Yes. Add a rate_limit block to the unity_playerprefs_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_playerprefs_set completely? +

Set action: deny in the PolicyLayer policy for unity_playerprefs_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_playerprefs_set? +

unity_playerprefs_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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