niagara_set_parameter

A write tool on the Uefn MCP server.

SERVERUefn SOURCEquangdang46/uefn-verse-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/quangdang46-uefn-verse-mcp/niagara-set-parameter.md

WHAT IT DOES

What niagara_set_parameter does on Uefn

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

RISK

Why niagara_set_parameter is rated Medium

The tool modifies parameter state in a Niagara system (particle effects), which is reversible and non-destructive. This aligns with Write category (creates/modifies data reversibly). Confidence is reduced due to empty description, but the name structure strongly suggests parameter modification within the UEFN editor environment, which typically supports undo/redo.

From the tool's definition Tool name 'niagara_set_parameter' indicates it sets/modifies a parameter in Niagara (Unreal's particle/visual effects system). The 'set' verb and the context of an editor tool suggest data modification. Description is empty, limiting certainty.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

niagara_set_parameter Rate-limited

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

FAQ

Questions about niagara_set_parameter

What does the niagara_set_parameter tool do? +

niagara_set_parameter is a write tool on the Uefn MCP server. It is categorised as a Write tool in the Uefn MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on niagara_set_parameter? +

Register the Uefn MCP server in PolicyLayer and add a rule for niagara_set_parameter: 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.

What risk level is niagara_set_parameter? +

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

Can I rate-limit niagara_set_parameter? +

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

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

niagara_set_parameter 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.

KEEP EXPLORING

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