add_mapping_trigger

A write tool on the Unreal- MCP server.

SERVERUnreal-MCP SOURCEaadeshrao123/unreal-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/aadeshrao123-unreal-mcp/add-mapping-trigger.md

WHAT IT DOES

What add_mapping_trigger does on Unreal-MCP

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

RISK

Why add_mapping_trigger is rated Medium

The tool adds a trigger to an input mapping, which creates or modifies editor configuration reversibly. This is a Write operation—it changes project state but can be undone. Severity is medium because misuse could corrupt input mappings and impair editor usability, but effects are localized to input configuration and reversible.

From the tool's definition Tool name 'add_mapping_trigger' suggests creating or modifying input mappings in Unreal Engine 5 editor. Sibling tools like 'add_input_action_trigger' and 'add_key_mapping' confirm this operates within the input system.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs add_mapping_trigger safely

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

add_mapping_trigger Rate-limited

add_mapping_trigger 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": {
    "add_mapping_trigger": {
      "limits": [
        {
          "counter": "add_mapping_trigger_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 Unreal-MCP, apply this rule, and every add_mapping_trigger call is checked against it from then on.

FAQ

Questions about add_mapping_trigger

What does the add_mapping_trigger tool do? +

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

How do I enforce a policy on add_mapping_trigger? +

Register the Unreal MCP server in PolicyLayer and add a rule for add_mapping_trigger: 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 Unreal-MCP. Nothing to install.

What risk level is add_mapping_trigger? +

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

Can I rate-limit add_mapping_trigger? +

Yes. Add a rate_limit block to the add_mapping_trigger 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 add_mapping_trigger completely? +

Set action: deny in the PolicyLayer policy for add_mapping_trigger. 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 add_mapping_trigger? +

add_mapping_trigger is provided by the Unreal MCP server (aadeshrao123/unreal-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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