mass_create_objects · Melo MCP: Risk & Policy

WHAT IT DOES

What mass_create_objects does on Melo

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

WHY IT NEEDS A POLICY

Why mass_create_objects needs a policy

This tool creates (writes) new data objects in Roblox Studio but does not permanently delete data, execute arbitrary code, or cause financial impact. While it modifies the project state, the atomic transaction with rollback capability limits severity to medium rather than high. The blast radius is constrained to object creation within the development environment.

From the tool's definition Tool performs 'Create multiple instances in a single atomic operation' with batch operations that are 'transaction-safe' per server description.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

mass_create_objects Rate-limited

mass_create_objects 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": {
    "mass_create_objects": {
      "limits": [
        {
          "counter": "mass_create_objects_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Melo, so you can run agents against it safely.

FAQ

Questions about mass_create_objects

What does the mass_create_objects tool do? +

Create multiple instances in a single atomic operation. If any creation fails, all are rolled back. Args: - objects (array): Array of { className, parent, name?, properties? } Returns: Array of created instance paths, or error with rollback confirmation. It is categorised as a Write tool in the Melo MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on mass_create_objects? +

Register the Melo MCP server in PolicyLayer and add a rule for mass_create_objects: 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 Melo. Nothing to install.

What risk level is mass_create_objects? +

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

Can I rate-limit mass_create_objects? +

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

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

mass_create_objects is provided by the Melo MCP server (yannyhl/linkedsword-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.