Select all actors inside a zone volume.
AI agents call zone_select_contents to retrieve information from Uefn without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool selects actors within a zone volume, which is a UI/editor selection operation. It queries and highlights objects but does not modify, delete, or execute any logic. Selection in an editor context is a read-like operation with no persistent side effects, though it does change editor state transiently.
From the tool's definition Select all actors inside a zone volume
Documented attack patterns abuse exactly the kind of access zone_select_contents gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Uefn, and nothing reaches the server without passing your rules. This is the rule we recommend for zone_select_contents:
{
"version": "1",
"default": "deny",
"tools": {
"zone_select_contents": {}
}
}zone_select_contents is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Select all actors inside a zone volume. It is categorised as a Read tool in the Uefn MCP Server, which means it retrieves data without modifying state.
Register the Uefn MCP server in PolicyLayer and add a rule for zone_select_contents: 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 Uefn. Nothing to install.
zone_select_contents 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 zone_select_contents 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 zone_select_contents. 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.
zone_select_contents is provided by the Uefn MCP server (quangdang46/uefn-verse-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Uefn, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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