snapshot_diff

What snapshot_diff does on Uefn

AI agents call snapshot_diff to retrieve information from Uefn without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

Why snapshot_diff is rated Low

This tool retrieves and examines data (level state and snapshot) to produce a comparison result. It performs a read-only query operation with no side effects on the Unreal Editor or Fortnite level state. No data is created, modified, deleted, or external operations triggered. Even if an AI misuses it by repeatedly calling it, the blast radius is negligible—only computational cost and potentially verbose output.

From the tool's definition Tool name is 'snapshot_diff' and description states it 'Compare[s] the current level state against a saved snapshot.' The verb 'compare' indicates a retrieval and analysis operation with no modifications to game state.

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

{
  "version": "1",
  "default": "deny",
  "tools": {
    "snapshot_diff": {}
  }
}

Questions about snapshot_diff