set_main_scene

Set the project's main scene

SERVERGodot SOURCE@keeveeg/godot-mcp

Medium RISK CLASS

Category Write

Parameters 11 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-main-scene.md

WHAT IT DOES

What set_main_scene does on Godot

AI agents use set_main_scene 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	Scene file path to set as main scene

Parameters from the server's own tool schema.

RISK

Why set_main_scene is rated Medium

This tool modifies project settings by changing which scene loads at startup. While reversible (the previous setting can be restored), it fundamentally alters project behavior and could break project functionality if set to a missing or invalid scene.

From the tool's definition Tool name 'set_main_scene' and description 'Set the project's main scene' indicate modification of a critical project configuration file (typically scene.tscn or project.godot).

Risk signalsAccepts file system path (path)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs set_main_scene 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_main_scene, this is the rule to start with:

set_main_scene Rate-limited

set_main_scene 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_main_scene": {
      "limits": [
        {
          "counter": "set_main_scene_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_main_scene call is checked against it from then on.

FAQ

Questions about set_main_scene

What does the set_main_scene tool do? +

Set the project's main scene. 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_main_scene accept? +

set_main_scene accepts 1 parameter: path. 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_main_scene? +

Register the Godot MCP server in PolicyLayer and add a rule for set_main_scene: 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_main_scene? +

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

Can I rate-limit set_main_scene? +

Yes. Add a rate_limit block to the set_main_scene 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_main_scene completely? +

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

set_main_scene 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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