board_create
Build a board scene whose children are addressable cells (each a cell_<id> node in the board_cells group) from a ring, grid, or explicit-cells layout. Cells are Marker2D (or Control) anchors positioned by pure layout math; an optional background (color or res:// art) sits behind them. General-pur...
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What board_create does on Breakpoint
AI agents use board_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 |
|---|---|---|---|
path | string | Yes | Where to save the board scene, e.g. res://ui/board/Board.tscn |
layout | object | Yes | ring{cells[]} | grid{rows,cols} | cells{cells[{id,x,y}]} |
confirm | boolean | — | Skip the confirmation prompt (auto-approve) |
cell_kind | string | — | marker→Marker2D anchor (default), control→Control anchor |
cell_size | number | — | Cell pitch in px (drives ring radius / grid spacing; default 96) |
overwrite | boolean | — | Replace an existing board at `path` (default false). With overwrite omitted or false an existing `path` is REFUSED (`exists`) rather than written — before 1.39. |
root_type | string | — | Board root node type (default Node2D) |
background | object | — | Optional background drawn behind the cells |
Parameters from the server's own tool schema.
Why board_create is rated Medium
An AI agent can call board_create faster than any human can review: one bad instruction and it creates or modifies resources in Breakpoint by the hundred, each call as confident as the last.
Risk signalsAccepts file system path (path) · High parameter count (13 properties)
Attacks that exploit this kind of access
The rule that runs board_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 board_create, this is the rule to start with:
board_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.
The button opens the PolicyLayer dashboard: create your workspace, connect Breakpoint, apply this rule, and every board_create call is checked against it from then on.
Questions about board_create
Build a board scene whose children are addressable cells (each a cell_<id> node in the board_cells group) from a ring, grid, or explicit-cells layout. Cells are Marker2D (or Control) anchors positioned by pure layout math; an optional background (color or res:// art) sits behind them. General-purpose — cells carry only caller-supplied ids. DESTRUCTIVE (writes a scene) — gated by confirmation. Puts the editor back on the scene you had open; edited_scene names where it landed. 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.
board_create accepts 8 parameters: path, layout, confirm, cell_kind, cell_size, overwrite, root_type, background. Required: path, layout. 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 board_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.
board_create 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 board_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.
Set action: deny in the PolicyLayer policy for board_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.
board_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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