node_change_type
Replace a node with a new node of a different class, carrying over compatible properties, children, and groups (undoable). Refuses the scene root.
This record as markdown: /tools/breakpoint-mcp/node-change-type.md
What node_change_type does on Breakpoint
AI agents use node_change_type 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 |
|---|---|---|---|
path | string | Yes | Node path relative to the scene root |
type | string | Yes | New node class, e.g. Sprite2D, StaticBody3D |
Parameters from the server's own tool schema.
Why node_change_type is rated Medium
This tool modifies the scene graph by replacing an existing node with a new node of a different type, while preserving compatible data. It is a reversible (undoable) write operation. The high severity reflects the broad structural impact on the scene — replacing node types can break scripts, signals, and scene logic if misused by an agent.
From the tool's definition Replace a node with a new node of a different class, carrying over compatible properties, children, and groups (undoable). Refuses the scene root.
Risk signalsAccepts file system path (path) · Admin/system-level operation
Attacks that exploit this kind of access
The rule that runs node_change_type 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 node_change_type, this is the rule to start with:
node_change_type 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.
The button opens the PolicyLayer dashboard: create your workspace, connect Breakpoint, apply this rule, and every node_change_type call is checked against it from then on.
Questions about node_change_type
Replace a node with a new node of a different class, carrying over compatible properties, children, and groups (undoable). Refuses the scene root. 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.
node_change_type accepts 2 parameters: path, type. Required: path, type. The full parameter table on this page comes from the server's own tool schema.
Register the Breakpoint MCP server in PolicyLayer and add a rule for node_change_type: 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.
node_change_type is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the node_change_type 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.
Set action: deny in the PolicyLayer policy for node_change_type. 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.
node_change_type 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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