rename_item · Synology MCP Server MCP: Risk & Policy

WHAT IT DOES

What rename_item does on Synology MCP Server

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

WHY IT NEEDS A POLICY

Why rename_item needs a policy

Renaming is a reversible, non-destructive write operation. It modifies file/folder metadata but does not delete data or cause data loss. The blast radius is moderate: an agent could rename critical system files or folders causing operational disruption, but the action can be undone.

From the tool's definition Tool description states 'Rename a file or folder' — a direct modification operation that alters metadata of existing data on the NAS.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

rename_item Rate-limited

rename_item 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": {
    "rename_item": {
      "limits": [
        {
          "counter": "rename_item_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 Synology MCP Server, so you can run agents against it safely.

FAQ

Questions about rename_item

What does the rename_item tool do? +

Rename a file or folder. It is categorised as a Write tool in the Synology 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 rename_item? +

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

What risk level is rename_item? +

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

Can I rate-limit rename_item? +

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

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

rename_item is provided by the Synology MCP Server MCP server (rafalr100/synology-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.