# smart_spawn

A execute tool on the Uefn MCP server.

Agent View of the PolicyLayer registry record for `smart_spawn`. HTML page: https://policylayer.com/tools/quangdang46-uefn-verse-mcp/smart-spawn

## Facts

- Tool: `smart_spawn`
- Server: Uefn (`quangdang46/uefn-verse-mcp`) — https://policylayer.com/tools/quangdang46-uefn-verse-mcp.md
- Homepage: https://github.com/quangdang46/uefn-verse-mcp
- Risk category: Execute (High risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "smart_spawn",
    "arguments": {}
  }
}
```

## Why smart_spawn is rated High

The name 'smart_spawn' implies executing a spawn operation in the live UEFN editor environment. Given the sibling tools that manipulate actors (move, hide, show, lock, place audio), this tool likely spawns new actors or objects into the scene. Spawning can trigger external operations in the live editor with potentially broad effects. However, the empty description significantly lowers confidence.

From the tool's own definition: "Tool name 'smart_spawn' suggests spawning/creating actors or objects in the UEFN editor; description is empty and uninformative."

## Use case

AI agents invoke smart_spawn to trigger actions in Uefn. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Uefn:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "smart_spawn": {
      "limits": [
        {
          "counter": "smart_spawn_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Uefn (142)

- `delete_actors` — Destructive — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/delete-actors.md
- `delete_asset` — Destructive — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/delete-asset.md
- `shutdown` — Destructive — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/shutdown.md
- `snapshot_restore` — Destructive — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/snapshot-restore.md
- `tag_remove` — Destructive — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/tag-remove.md
- `undo` — Destructive — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/undo.md
- `batch_exec` — Execute — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/batch-exec.md
- `blueprint_compile` — Execute — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/blueprint-compile.md
- `bulk_mirror` — Execute — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/bulk-mirror.md
- `device_call_method` — Execute — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/device-call-method.md
- `device_sim_generate_proxy` — Execute — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/device-sim-generate-proxy.md
- `device_sim_trigger_method` — Execute — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/device-sim-trigger-method.md
- `execute_python` — Execute — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/execute-python.md
- `focus_selected` — Execute — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/focus-selected.md
- `niagara_spawn_system` — Execute — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/niagara-spawn-system.md
- `postprocess_spawn` — Execute — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/postprocess-spawn.md
- `refresh_device_catalog` — Execute — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/refresh-device-catalog.md
- `run_tool` — Execute — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/run-tool.md
- `scatter_along_spline` — Execute — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/scatter-along-spline.md
- `scatter_props` — Execute — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/scatter-props.md
- `select_actors` — Execute — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/select-actors.md
- `select_by_class` — Execute — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/select-by-class.md
- `sign_spawn_bulk` — Execute — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/sign-spawn-bulk.md
- `verse_build` — Execute — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/verse-build.md
- `verse_template_deploy` — Execute — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/verse-template-deploy.md
- `zone_spawn` — Execute — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/zone-spawn.md
- `bulk_randomize` — Other — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/bulk-randomize.md
- `pattern_circle` — Other — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/pattern-circle.md
- `pattern_grid` — Other — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/pattern-grid.md
- `pattern_line` — Other — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/pattern-line.md
- …and 112 more: https://policylayer.com/tools/quangdang46-uefn-verse-mcp.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=quangdang46-uefn-verse-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/quangdang46-uefn-verse-mcp