set_bus_volume · Godot MCP: Risk & Policy

WHAT IT DOES

What set_bus_volume does on Godot

AI agents use set_bus_volume 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.

PARAMETERS

Parameter	Type	Required	Description
`bus_index`	number	Yes	Bus index
`volume_db`	number	Yes	Volume in dB (e.g. -6.0, 0.0, 3.0)
`layout_path`	object	—

Parameters from the server's own tool schema.

WHY IT NEEDS A POLICY

Why set_bus_volume needs a policy

This tool modifies an audio bus volume setting, which is a reversible write operation. It changes a configuration value that can be changed back. The blast radius is low as it only affects audio volume levels in the Godot project.

From the tool's definition Set bus volume in dB

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_bus_volume Rate-limited

set_bus_volume 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_bus_volume": {
      "limits": [
        {
          "counter": "set_bus_volume_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Godot, so you can run agents against it safely.

FAQ

Questions about set_bus_volume

What does the set_bus_volume tool do? +

Set bus volume in dB. 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_bus_volume accept? +

set_bus_volume accepts 3 parameters: bus_index, volume_db, layout_path. Required: bus_index, volume_db. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on set_bus_volume? +

Register the Godot MCP server in PolicyLayer and add a rule for set_bus_volume: 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_bus_volume? +

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

Can I rate-limit set_bus_volume? +

Yes. Add a rate_limit block to the set_bus_volume 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_bus_volume completely? +

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

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