# execute_python Execute arbitrary Python code in UEFN editor. Agent View of the PolicyLayer registry record for `execute_python`. HTML page: https://policylayer.com/tools/quangdang46-uefn-verse-mcp/execute-python ## Facts - Tool: `execute_python` - 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": "execute_python", "arguments": {} } } ``` ## Why execute_python is rated High This tool allows execution of arbitrary Python code within the UEFN (Unreal Editor for Fortnite) environment. While the sibling tools are constrained operations (actor manipulation, audio management), execute_python grants the ability to run any Python code, which could modify editor state, trigger side effects, access sensitive data, or cause unpredictable behavior depending on what code is supplied. From the tool's own definition: "Tool name is 'execute_python' with description 'Execute arbitrary Python code in UEFN editor.' The word 'arbitrary' combined with 'Execute' indicates the tool runs code with arguments that determine effects." ## Use case AI agents invoke execute_python 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": { "execute_python": { "limits": [ { "counter": "execute_python_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 - `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 - `smart_spawn` — Execute — https://policylayer.com/tools/quangdang46-uefn-verse-mcp/smart-spawn.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