actor_set_label

A write tool on the Uefn MCP server.

SERVERUefn SOURCEquangdang46/uefn-verse-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/quangdang46-uefn-verse-mcp/actor-set-label.md

WHAT IT DOES

What actor_set_label does on Uefn

AI agents use actor_set_label to create or update resources in Uefn, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Uefn environment.

RISK

Why actor_set_label is rated Medium

This tool creates or modifies actor properties in the Unreal Editor without permanent deletion. Setting a label is a reversible operation—the label can be changed again. Although the empty description reduces confidence, the clear intent from the tool name and context of sibling actor manipulation tools places this squarely in the Write category.

From the tool's definition Tool name 'actor_set_label' indicates it modifies an actor property (label/name). While the description is empty, the naming convention and sibling tools (actor_move_to_folder, actor_hide, actor_show) suggest this performs a reversible modification to actor…

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs actor_set_label safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Uefn, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For actor_set_label, this is the rule to start with:

actor_set_label Rate-limited

actor_set_label 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "actor_set_label": {
      "limits": [
        {
          "counter": "actor_set_label_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Uefn, apply this rule, and every actor_set_label call is checked against it from then on.

FAQ

Questions about actor_set_label

What does the actor_set_label tool do? +

actor_set_label is a write tool on the Uefn MCP server. It is categorised as a Write tool in the Uefn MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on actor_set_label? +

Register the Uefn MCP server in PolicyLayer and add a rule for actor_set_label: 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.

What risk level is actor_set_label? +

actor_set_label is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit actor_set_label? +

Yes. Add a rate_limit block to the actor_set_label 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.

How do I block actor_set_label completely? +

Set action: deny in the PolicyLayer policy for actor_set_label. 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.

What MCP server provides actor_set_label? +

actor_set_label 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.

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