unity_scriptableobject_set_field

THE RISK

Medium Risk

Why unity_scriptableobject_set_field needs a policy

This tool creates or modifies data reversibly within Unity ScriptableObject assets. While it changes asset state, the modification is non-destructive and can be undone. The severity is medium because misuse could corrupt game configuration, data structures, or asset settings in ways requiring rework, but the effects are confined to the asset itself and potentially reversible through version control or undo…

From the tool's definition Tool name includes 'set_field' and description states 'Set a field value on a ScriptableObject asset', indicating modification of data.

Documented attack patterns abuse exactly the kind of access unity_scriptableobject_set_field gives an agent:

POLICY

How to control unity_scriptableobject_set_field

PolicyLayer is an MCP gateway — it sits between your AI agents and Unity MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for unity_scriptableobject_set_field:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "unity_scriptableobject_set_field": {
      "limits": [
        {
          "counter": "unity_scriptableobject_set_field_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

unity_scriptableobject_set_field 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.

Create a free account and register Unity MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

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EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about unity_scriptableobject_set_field

What does the unity_scriptableobject_set_field tool do? +

Set a field value on a ScriptableObject asset. Supports int, float, bool, string, and enum types. 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_scriptableobject_set_field? +

Register the Unity MCP Server MCP server in PolicyLayer and add a rule for unity_scriptableobject_set_field: 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_scriptableobject_set_field? +

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

Can I rate-limit unity_scriptableobject_set_field? +

Yes. Add a rate_limit block to the unity_scriptableobject_set_field 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_scriptableobject_set_field completely? +

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

unity_scriptableobject_set_field 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.

Enforce policy on every Unity MCP Server tool call.

Start from Unity MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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