This record as markdown: /tools/quangdang46-uefn-verse-mcp/smart-spawn.md
What smart_spawn does on Uefn
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.
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 definition Tool name 'smart_spawn' suggests spawning/creating actors or objects in the UEFN editor; description is empty and uninformative.
Attacks that exploit this kind of access
The rule that runs smart_spawn 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 smart_spawn, this is the rule to start with:
smart_spawn stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Uefn, apply this rule, and every smart_spawn call is checked against it from then on.
Questions about smart_spawn
smart_spawn is a execute tool on the Uefn MCP server. It is categorised as a Execute tool in the Uefn MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Uefn MCP server in PolicyLayer and add a rule for smart_spawn: 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 Uefn. Nothing to install.
smart_spawn is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the smart_spawn 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.
Set action: deny in the PolicyLayer policy for smart_spawn. 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.
smart_spawn is provided by the Uefn MCP server (quangdang46/uefn-verse-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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