dataset_promote

Promote a cloned dataset to no longer depend on its origin snapshot

SERVERTruenas SOURCEspranab/truenas-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/spranab-truenas-mcp/dataset-promote.md

WHAT IT DOES

What dataset_promote does on Truenas

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

RISK

Why dataset_promote is rated Medium

This tool modifies dataset metadata and storage relationships irreversibly by severing snapshot dependencies. While it doesn't delete data or move money, promoting a dataset can have significant storage management consequences (e.g., preventing snapshot deletion, changing data lifecycle). It's Write rather than Destructive because the operation itself doesn't erase data—it reconfigures relationships.

From the tool's definition Tool performs 'promote' operation on a cloned dataset, which modifies the dataset's dependency structure and metadata.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs dataset_promote safely

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

dataset_promote Rate-limited

dataset_promote 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": {
    "dataset_promote": {
      "limits": [
        {
          "counter": "dataset_promote_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 Truenas, apply this rule, and every dataset_promote call is checked against it from then on.

FAQ

Questions about dataset_promote

What does the dataset_promote tool do? +

Promote a cloned dataset to no longer depend on its origin snapshot. It is categorised as a Write tool in the Truenas MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on dataset_promote? +

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

What risk level is dataset_promote? +

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

Can I rate-limit dataset_promote? +

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

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

dataset_promote is provided by the Truenas MCP server (spranab/truenas-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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