set_key_mapping

Change the key or action on an existing mapping in an IMC.

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/set-key-mapping.md

WHAT IT DOES

What set_key_mapping does on Unreal-MCP

AI agents use set_key_mapping 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 set_key_mapping is rated Medium

This tool updates input mappings (IMC = Input Mapping Context) in Unreal Engine, which is a write operation that changes configuration but remains reversible. It does not execute arbitrary code, delete data, or cause financial impact. The blast radius is medium because incorrect input mappings could disrupt game controls or editor functionality, potentially requiring manual correction.

From the tool's definition 'Change the key or action on an existing mapping in an IMC' — modifies existing input mapping configuration, which is a reversible update to engine settings/data.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs set_key_mapping 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 set_key_mapping, this is the rule to start with:

set_key_mapping Rate-limited

set_key_mapping 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": {
    "set_key_mapping": {
      "limits": [
        {
          "counter": "set_key_mapping_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 set_key_mapping call is checked against it from then on.

FAQ

Questions about set_key_mapping

What does the set_key_mapping tool do? +

Change the key or action on an existing mapping in an IMC. 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 set_key_mapping? +

Register the Unreal MCP server in PolicyLayer and add a rule for set_key_mapping: 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 set_key_mapping? +

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

Can I rate-limit set_key_mapping? +

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

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

set_key_mapping 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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