unity_terrain_raise_lower
Raise or lower terrain height at a normalized position with a brush radius and falloff. Use positive delta to raise, negative to lower.
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What unity_terrain_raise_lower does on Unity MCP Server
AI agents use unity_terrain_raise_lower to create or update resources in Unity MCP Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Unity MCP Server environment.
Why unity_terrain_raise_lower is rated Medium
This tool modifies Unity terrain geometry (height data), which is a reversible write operation. It changes scene/asset data but does not delete or irreversibly destroy content — terrain height can be adjusted back. Misuse could corrupt terrain design but is not inherently destructive or irreversible.
From the tool's definition Raise or lower terrain height at a normalized position with a brush radius and falloff. Use positive delta to raise, negative to lower.
Attacks that exploit this kind of access
The rule that runs unity_terrain_raise_lower safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Unity MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For unity_terrain_raise_lower, this is the rule to start with:
unity_terrain_raise_lower 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 Unity MCP Server, apply this rule, and every unity_terrain_raise_lower call is checked against it from then on.
Questions about unity_terrain_raise_lower
Raise or lower terrain height at a normalized position with a brush radius and falloff. Use positive delta to raise, negative to lower. It is categorised as a Write tool in the Unity MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Unity MCP Server MCP server in PolicyLayer and add a rule for unity_terrain_raise_lower: 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 Unity MCP Server. Nothing to install.
unity_terrain_raise_lower 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 unity_terrain_raise_lower 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 unity_terrain_raise_lower. 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.
unity_terrain_raise_lower is provided by the Unity MCP Server MCP server (anklebreaker-studio/unity-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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