instantiateComponent

A write tool on the Spline MCP server.

SERVERSpline MCP Server SOURCEaydinfer/spline-mcp-server

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/aydinfer-spline-mcp-server/instantiatecomponent.md

WHAT IT DOES

What instantiateComponent does on Spline MCP Server

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

RISK

Why instantiateComponent is rated Medium

Instantiating a component creates a new object or instance in the design scene, which is a reversible Write operation. It modifies the scene state by adding content but does not execute arbitrary code, delete data, or cause financial impact. Severity is medium because misuse could create unwanted design elements requiring manual cleanup, but the impact is localized to the design project and easily undone.

From the tool's definition Tool name 'instantiateComponent' suggests creating/instantiating a new component instance in Spline 3D design environment.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs instantiateComponent safely

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

instantiateComponent Rate-limited

instantiateComponent 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": {
    "instantiateComponent": {
      "limits": [
        {
          "counter": "instantiatecomponent_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 Spline MCP Server, apply this rule, and every instantiateComponent call is checked against it from then on.

FAQ

Questions about instantiateComponent

What does the instantiateComponent tool do? +

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

How do I enforce a policy on instantiateComponent? +

Register the Spline MCP Server MCP server in PolicyLayer and add a rule for instantiateComponent: 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 Spline MCP Server. Nothing to install.

What risk level is instantiateComponent? +

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

Can I rate-limit instantiateComponent? +

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

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

instantiateComponent is provided by the Spline MCP Server MCP server (aydinfer/spline-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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