AI agents call get_hierarchy to retrieve information from Unity without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves structural information about Unity scenes or prefabs (hierarchy relationships) without creating, modifying, deleting, or executing anything. It is purely informational and presents no risk of side effects, unintended modifications, or resource damage. Confidence is high because the description is clear and the operation is inherently read-only.
From the tool's definition Tool description states 'Get the full parent→child hierarchy tree' - a retrieval operation with no modification, deletion, or execution capability. The verb 'Get' and context of querying scene/prefab structure confirms read-only access to metadata.
Risk signalsAdmin/system-level operation
Attacks that exploit this kind of access
Get the full parent→child hierarchy tree for a scene or prefab root. It is categorised as a Read tool in the Unity MCP Server, which means it retrieves data without modifying state.
Register the Unity MCP server in PolicyLayer and add a rule for get_hierarchy: 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. Nothing to install.
get_hierarchy 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 get_hierarchy 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 get_hierarchy. 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.
get_hierarchy is provided by the Unity MCP server (verysleepylemon/unity-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
get_hierarchy is one line of Unity's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
Teams ship this data inside their own products. See what a licence covers →