reparent_object · Melo MCP: Risk & Policy

WHAT IT DOES

What reparent_object does on Melo

AI agents use reparent_object 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 reparent_object needs a policy

Reparenting moves an instance to a different location in the hierarchy, which is a reversible structural modification (it can be moved back). This is a Write operation. Severity is medium because misuse could disorganize project structure, but it's not destructive since the instance itself is preserved.

From the tool's definition Move an instance to a new parent

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

reparent_object Rate-limited

reparent_object 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": {
    "reparent_object": {
      "limits": [
        {
          "counter": "reparent_object_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 reparent_object

What does the reparent_object tool do? +

Move an instance to a new parent. Args: - path (string): Path to the instance to move - newParent (string): Path to the new parent instance Returns: Confirmation with new path. 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 reparent_object? +

Register the Melo MCP server in PolicyLayer and add a rule for reparent_object: 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 reparent_object? +

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

Can I rate-limit reparent_object? +

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

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

reparent_object 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.