AI agents call list_scenes 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 retrieves metadata about scenes in a Unity project without side effects. It is a read-only listing operation, consistent with other sibling tools like 'list_prefabs', 'get_scene_objects', and 'get_hierarchy' that query project structure. There is no capability to modify, delete, or execute code. Severity is low because listing scene names poses minimal security risk even if misused by an AI agent.
From the tool's definition Tool name 'list_scenes' and description 'List all Unity scenes in the project' indicate a query/retrieval operation with no modification or execution capability.
Attacks that exploit this kind of access
List all Unity scenes in the project. 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 list_scenes: 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.
list_scenes 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 list_scenes 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 list_scenes. 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.
list_scenes 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.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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