sculpt_terrain
Apply a heightmap brush at (x, y) to MapBuilder. Modes: raise, lower, flatten, smooth. Modifies the current heightmap directly and rebuilds the mesh; edits survive between calls but are lost when
This record as markdown: /tools/sbox/sculpt-terrain.md
What sculpt_terrain does on Sbox
AI agents use sculpt_terrain to create or update resources in Sbox, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Sbox environment.
Why sculpt_terrain is rated Medium
Reversibly modifies game terrain geometry; changes persist but are undoable within editor context.
From the tool's definition Apply heightmap brush, modifies current heightmap directly, rebuilds mesh
Attacks that exploit this kind of access
The rule that runs sculpt_terrain safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Sbox, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For sculpt_terrain, this is the rule to start with:
sculpt_terrain 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 Sbox, apply this rule, and every sculpt_terrain call is checked against it from then on.
Questions about sculpt_terrain
Apply a heightmap brush at (x, y) to MapBuilder. Modes: raise, lower, flatten, smooth. Modifies the current heightmap directly and rebuilds the mesh; edits survive between calls but are lost when. It is categorised as a Write tool in the Sbox MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Sbox MCP server in PolicyLayer and add a rule for sculpt_terrain: 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 Sbox. Nothing to install.
sculpt_terrain 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 sculpt_terrain 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 sculpt_terrain. 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.
sculpt_terrain is provided by the Sbox MCP server (sbox-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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