# list_physics_materials

A read tool on the Godot MCP server.

Agent View of the PolicyLayer registry record for `list_physics_materials`. HTML page: https://policylayer.com/tools/yanhuifair-godot-mcp/list-physics-materials

## Facts

- Tool: `list_physics_materials`
- Server: Godot (`@yanhuifair/godot-mcp`) — https://policylayer.com/tools/yanhuifair-godot-mcp.md
- Install: `npx -y @yanhuifair/godot-mcp`
- Homepage: git+https://github.com/yanhuifair/Godot-MCP.git
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 1
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `path` | object | no | Subdirectory to search |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "list_physics_materials",
    "arguments": {}
  }
}
```

## Why list_physics_materials is rated Low

This tool retrieves or enumerates PhysicsMaterials from the Godot engine, which is a read-only operation with no side effects. It does not create, modify, delete, execute code, or perform financial operations. The low severity reflects minimal blast radius if misused—an agent could only discover what physics materials exist in the project.

From the tool's own definition: "Tool name 'list_physics_materials' and description 'List PhysicsMaterials' indicate a retrieval operation with the verb 'list', which queries existing data without modification."

Risk signals: Accepts file system path (path)

## Use case

AI agents call list_physics_materials to retrieve information from Godot without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Godot:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_physics_materials": {}
  }
}
```

## Other tools on Godot (281)

- `delete_file` — Destructive — https://policylayer.com/tools/yanhuifair-godot-mcp/delete-file.md
- `editor_delete_asset` — Destructive — https://policylayer.com/tools/yanhuifair-godot-mcp/editor-delete-asset.md
- `editor_delete_selected` — Destructive — https://policylayer.com/tools/yanhuifair-godot-mcp/editor-delete-selected.md
- `editor_remove_autoload` — Destructive — https://policylayer.com/tools/yanhuifair-godot-mcp/editor-remove-autoload.md
- `editor_remove_input_action` — Destructive — https://policylayer.com/tools/yanhuifair-godot-mcp/editor-remove-input-action.md
- `editor_remove_node` — Destructive — https://policylayer.com/tools/yanhuifair-godot-mcp/editor-remove-node.md
- `remove_animation_track` — Destructive — https://policylayer.com/tools/yanhuifair-godot-mcp/remove-animation-track.md
- `remove_audio_bus` — Destructive — https://policylayer.com/tools/yanhuifair-godot-mcp/remove-audio-bus.md
- `remove_autoload` — Destructive — https://policylayer.com/tools/yanhuifair-godot-mcp/remove-autoload.md
- `remove_input_action` — Destructive — https://policylayer.com/tools/yanhuifair-godot-mcp/remove-input-action.md
- `remove_node` — Destructive — https://policylayer.com/tools/yanhuifair-godot-mcp/remove-node.md
- `remove_shader_graph_node` — Destructive — https://policylayer.com/tools/yanhuifair-godot-mcp/remove-shader-graph-node.md
- `compile_shader` — Execute — https://policylayer.com/tools/yanhuifair-godot-mcp/compile-shader.md
- `editor_bake_lightmaps` — Execute — https://policylayer.com/tools/yanhuifair-godot-mcp/editor-bake-lightmaps.md
- `editor_bake_navigation` — Execute — https://policylayer.com/tools/yanhuifair-godot-mcp/editor-bake-navigation.md
- `editor_debug_break` — Execute — https://policylayer.com/tools/yanhuifair-godot-mcp/editor-debug-break.md
- `editor_debug_continue` — Execute — https://policylayer.com/tools/yanhuifair-godot-mcp/editor-debug-continue.md
- `editor_debug_step` — Execute — https://policylayer.com/tools/yanhuifair-godot-mcp/editor-debug-step.md
- `editor_debug_step_over` — Execute — https://policylayer.com/tools/yanhuifair-godot-mcp/editor-debug-step-over.md
- `editor_enable_plugin` — Execute — https://policylayer.com/tools/yanhuifair-godot-mcp/editor-enable-plugin.md
- `editor_evaluate_expression` — Execute — https://policylayer.com/tools/yanhuifair-godot-mcp/editor-evaluate-expression.md
- `editor_focus` — Execute — https://policylayer.com/tools/yanhuifair-godot-mcp/editor-focus.md
- `editor_get_class_doc` — Execute — https://policylayer.com/tools/yanhuifair-godot-mcp/editor-get-class-doc.md
- `editor_open_asset` — Execute — https://policylayer.com/tools/yanhuifair-godot-mcp/editor-open-asset.md
- `editor_open_dock` — Execute — https://policylayer.com/tools/yanhuifair-godot-mcp/editor-open-dock.md
- `editor_play` — Execute — https://policylayer.com/tools/yanhuifair-godot-mcp/editor-play.md
- `editor_reimport_asset` — Execute — https://policylayer.com/tools/yanhuifair-godot-mcp/editor-reimport-asset.md
- `editor_reload_scene` — Execute — https://policylayer.com/tools/yanhuifair-godot-mcp/editor-reload-scene.md
- `editor_run_gdscript` — Execute — https://policylayer.com/tools/yanhuifair-godot-mcp/editor-run-gdscript.md
- `editor_run_specific_scene` — Execute — https://policylayer.com/tools/yanhuifair-godot-mcp/editor-run-specific-scene.md
- …and 251 more: https://policylayer.com/tools/yanhuifair-godot-mcp.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=yanhuifair-godot-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/yanhuifair-godot-mcp