mp_add_spawner

Add a MultiplayerSpawner node under a parent (undoable). Godot 4 high-level multiplayer replicates

SERVERGodot Breakpoint SOURCEjlivingston-Cipher/godot-breakpoint-mcp

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/godot-breakpoint-mcp/mp-add-spawner.md

WHAT IT DOES

What mp_add_spawner does on Godot Breakpoint

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

RISK

Why mp_add_spawner is rated Medium

Adding a MultiplayerSpawner node creates new scene graph state that can be undone. While this affects multiplayer replication behavior in Godot, the operation itself is a reversible data modification (Write category). Severity is medium because incorrect spawner placement could disrupt multiplayer game logic, but the undoable nature and lack of external side effects limit the blast radius.

From the tool's definition Tool description states 'Add a MultiplayerSpawner node under a parent (undoable)'. The 'Add' operation creates a new node in the scene tree, which is a reversible modification (marked as 'undoable').

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs mp_add_spawner safely

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

mp_add_spawner Rate-limited

mp_add_spawner 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": {
    "mp_add_spawner": {
      "limits": [
        {
          "counter": "mp_add_spawner_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 Breakpoint, apply this rule, and every mp_add_spawner call is checked against it from then on.

FAQ

Questions about mp_add_spawner

What does the mp_add_spawner tool do? +

Add a MultiplayerSpawner node under a parent (undoable). Godot 4 high-level multiplayer replicates. It is categorised as a Write tool in the Godot Breakpoint MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on mp_add_spawner? +

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

What risk level is mp_add_spawner? +

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

Can I rate-limit mp_add_spawner? +

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

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

mp_add_spawner is provided by the Godot Breakpoint MCP server (jlivingston-Cipher/godot-breakpoint-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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