add_physics

Add a Rigidbody and collider to a GameObject, making it a dynamic physics object. Auto-selects BoxCollider if no collider type specified

SERVERSbox SOURCEsbox-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/sbox/add-physics.md

WHAT IT DOES

What add_physics does on Sbox

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

RISK

Why add_physics is rated Medium

This tool creates or modifies game object state by adding physics components (Rigidbody and collider). These changes are reversible—components can be removed or modified later. The operation does not execute arbitrary code, delete data irreversibly, or create financial impact. It falls squarely into the Write category as it modifies game object properties.

From the tool's definition Tool description states 'Add a Rigidbody and collider to a GameObject, making it a dynamic physics object.' The verb 'Add' and the function of modifying game object properties by attaching physics components indicates data modification.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs add_physics safely

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

add_physics Rate-limited

add_physics 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": {
    "add_physics": {
      "limits": [
        {
          "counter": "add_physics_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 Sbox, apply this rule, and every add_physics call is checked against it from then on.

FAQ

Questions about add_physics

What does the add_physics tool do? +

Add a Rigidbody and collider to a GameObject, making it a dynamic physics object. Auto-selects BoxCollider if no collider type specified. It is categorised as a Write tool in the Sbox MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add_physics? +

Register the Sbox MCP server in PolicyLayer and add a rule for add_physics: 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 Sbox. Nothing to install.

What risk level is add_physics? +

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

Can I rate-limit add_physics? +

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

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

add_physics is provided by the Sbox MCP server (sbox-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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