set_physics_material

Create and set a physics material on a node

SERVERGodot SOURCE@keeveeg/godot-mcp

Medium RISK CLASS

Category Write

Parameters 51 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/keeveeg-godot-mcp/set-physics-material.md

WHAT IT DOES

What set_physics_material does on Godot

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

Parameter	Type	Required	Description
`path`	string	Yes	Node path in the scene tree (e.g. 'Player/Sprite2D'). Use just the node name for root-level children (e.g. 'Player'), or empty string '' for the scene root itse
`rough`	boolean	—	Whether surface is rough
`bounce`	number	—	Bounce/Restitution coefficient
`friction`	number	—	Friction coefficient
`absorbent`	boolean	—	Whether the surface absorbs impact energy

Parameters from the server's own tool schema.

RISK

Why set_physics_material is rated Medium

This tool creates or modifies physics material settings (a reversible configuration change) rather than executing arbitrary code, deleting data, or causing destructive effects. It aligns with Write category as it creates and sets data. Severity is medium because incorrect physics material settings could affect game behavior and physics simulation, but the effect is scoped to a single node and is reversible.

From the tool's definition Tool name 'set_physics_material' and description 'Create and set a physics material on a node' indicate creation and modification of physics material properties within a Godot game engine project.

Risk signalsAccepts file system path (path)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs set_physics_material safely

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

set_physics_material Rate-limited

set_physics_material 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": {
    "set_physics_material": {
      "limits": [
        {
          "counter": "set_physics_material_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 Godot, apply this rule, and every set_physics_material call is checked against it from then on.

FAQ

Questions about set_physics_material

What does the set_physics_material tool do? +

Create and set a physics material on a node. It is categorised as a Write tool in the Godot MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does set_physics_material accept? +

set_physics_material accepts 5 parameters: path, rough, bounce, friction, absorbent. Required: path. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on set_physics_material? +

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

What risk level is set_physics_material? +

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

Can I rate-limit set_physics_material? +

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

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

set_physics_material is provided by the Godot MCP server (@keeveeg/godot-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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