save_asset

Force save a specific asset.

SERVERUnreal SOURCE@jjpxdev/unreal-mcp

Medium RISK CLASS

Category Write

Parameters 11 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/jjpxdev-unreal-mcp/save-asset.md

WHAT IT DOES

What save_asset does on Unreal

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

Parameter	Type	Required	Description
`asset_path`	string	Yes	Asset path to save

Parameters from the server's own tool schema.

RISK

Why save_asset is rated Medium

The tool modifies and persists asset state within Unreal Engine's project files. While save operations are reversible (existing saved versions can be restored or changes undone), they alter the project state and commit changes to disk. This is a Write action rather than Destructive since the asset itself is not deleted or irreversibly corrupted, and backups/version control may exist.

From the tool's definition Tool name 'save_asset' and description 'Force save a specific asset' indicate the tool persists data modifications to asset files.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs save_asset safely

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

save_asset Rate-limited

save_asset 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": {
    "save_asset": {
      "limits": [
        {
          "counter": "save_asset_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, apply this rule, and every save_asset call is checked against it from then on.

FAQ

Questions about save_asset

What does the save_asset tool do? +

Force save a specific asset. It is categorised as a Write tool in the Unreal MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does save_asset accept? +

save_asset accepts 1 parameter: asset_path. Required: asset_path. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on save_asset? +

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

What risk level is save_asset? +

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

Can I rate-limit save_asset? +

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

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

save_asset is provided by the Unreal MCP server (@jjpxdev/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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