dataset_unlock

Unlock an encrypted dataset

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-unlock.md

WHAT IT DOES

What dataset_unlock does on Truenas

AI agents use dataset_unlock 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_unlock is rated Medium

Unlocking an encrypted dataset modifies the access state and security posture of that dataset, making it a Write operation rather than Read (which would be mere inspection). While not destructive (data is not deleted or overwritten) or financial, it is high-severity because unauthorized unlocking of encrypted data could expose sensitive information to an AI agent and enable subsequent malicious actions.

From the tool's definition Tool name 'dataset_unlock' and description 'Unlock an encrypted dataset' indicate a state-changing operation on encrypted storage.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs dataset_unlock 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_unlock, this is the rule to start with:

dataset_unlock Rate-limited

dataset_unlock 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_unlock": {
      "limits": [
        {
          "counter": "dataset_unlock_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_unlock call is checked against it from then on.

FAQ

Questions about dataset_unlock

What does the dataset_unlock tool do? +

Unlock an encrypted dataset. 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_unlock? +

Register the Truenas MCP server in PolicyLayer and add a rule for dataset_unlock: 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_unlock? +

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

Can I rate-limit dataset_unlock? +

Yes. Add a rate_limit block to the dataset_unlock 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_unlock completely? +

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

dataset_unlock 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.

KEEP EXPLORING

More on Truenas, and thousands of servers like it.

This server

All 279 Truenas tools →

Across the catalogue

The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →