List all datasets, optionally filtered by pool name
AI agents call dataset_list to retrieve information from Truenas without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and displays information about datasets without creating, modifying, deleting, or executing any operations. It has minimal blast radius as it only exposes existing data that is already accessible to authorized users on the TrueNAS system.
From the tool's definition Tool name 'dataset_list' and description 'List all datasets, optionally filtered by pool name' indicate a read-only query operation with no modification or deletion capability.
Documented attack patterns abuse exactly the kind of access dataset_list gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Truenas, and nothing reaches the server without passing your rules. This is the rule we recommend for dataset_list:
{
"version": "1",
"default": "deny",
"tools": {
"dataset_list": {}
}
}dataset_list is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List all datasets, optionally filtered by pool name. It is categorised as a Read tool in the Truenas MCP Server, which means it retrieves data without modifying state.
Register the Truenas MCP server in PolicyLayer and add a rule for dataset_list: 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.
dataset_list is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the dataset_list 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.
Set action: deny in the PolicyLayer policy for dataset_list. 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.
dataset_list 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.
Start from Truenas, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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279 Truenas tools catalogued and risk-classified — across an index of 43,000+ MCP servers.