Get all tree instances on the terrain. Returns positions, prototype indices, scales, and count.
AI agents call unity_terrain_get_tree_instances to retrieve information from Unity MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves terrain tree instance data (positions, prototype indices, scales, count) without creating, modifying, deleting, or executing operations. It is a pure data query operation with no side effects, fitting the Read category. The low severity reflects minimal risk—an AI agent misusing this tool could only retrieve unwanted scene information, not damage assets or execute harmful commands.
From the tool's definition Tool name 'unity_terrain_get_tree_instances' and description 'Get all tree instances on the terrain. Returns positions, prototype indices, scales, and count.' indicate retrieval of terrain data with no modification or destructive capability.
Documented attack patterns abuse exactly the kind of access unity_terrain_get_tree_instances gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Unity MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for unity_terrain_get_tree_instances:
{
"version": "1",
"default": "deny",
"tools": {
"unity_terrain_get_tree_instances": {}
}
}unity_terrain_get_tree_instances is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get all tree instances on the terrain. Returns positions, prototype indices, scales, and count. It is categorised as a Read tool in the Unity MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Unity MCP Server MCP server in PolicyLayer and add a rule for unity_terrain_get_tree_instances: 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_get_tree_instances is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the unity_terrain_get_tree_instances 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_get_tree_instances. 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_get_tree_instances 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.
Deterministic rules across all 324 Unity MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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324 Unity MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.