control_create

SERVERBreakpoint SOURCEbreakpoint-mcp

Medium RISK CLASS

Category Write

Parameters 42 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/breakpoint-mcp/control-create.md

WHAT IT DOES

What control_create does on Breakpoint

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

Parameter	Type	Required	Description
`name`	string	—	Node name (defaults to the class name)
`text`	string	—	Initial text; applied only if the control has a 'text' property
`type`	string	Yes	Control subclass to instance, e.g. Button, Label, Panel, VBoxContainer, TextureRect
`parent_path`	string	Yes	Parent node path relative to the scene root; "." for the root

Parameters from the server's own tool schema.

RISK

Why control_create is rated Medium

This tool creates new UI elements (Control-derived nodes like Button, Label, Panel, etc.) in a UI tree structure. While creation is a form of modification, the key distinguishing factor is that the description explicitly marks the action as 'undoable'—meaning it can be reversed and is not irreversible. This makes it a Write operation rather than Destructive.

From the tool's definition The tool 'control_create' creates a new UI node under a parent and returns the path, with the description stating it is 'undoable', meaning the action is reversible. This is a creation operation that modifies the UI hierarchy.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs control_create safely

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

control_create Rate-limited

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

FAQ

Questions about control_create

What does the control_create tool do? +

Instance a Control-derived UI node (Button, Label, Panel, VBoxContainer, TextureRect, …) under a parent (undoable). Refuses non-Control classes. Optional 'text' is applied only to controls that expose a 'text' property. Returns the new node's path. It is categorised as a Write tool in the Breakpoint MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does control_create accept? +

control_create accepts 4 parameters: name, text, type, parent_path. Required: type, parent_path. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on control_create? +

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

What risk level is control_create? +

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

Can I rate-limit control_create? +

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

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

control_create is provided by the Breakpoint MCP server (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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