disk_smart_test_list
List SMART test results. Optionally filter by disk name.
This record as markdown: /tools/spranab-truenas-mcp/disk-smart-test-list.md
What disk_smart_test_list does on Truenas
AI agents call disk_smart_test_list to retrieve information from Truenas without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why disk_smart_test_list is rated Low
This tool retrieves and displays existing SMART test result data from TrueNAS storage devices. It performs a read-only query operation with no side effects, no data modification, and no irreversible actions. The optional filtering parameter does not change the non-destructive nature of the operation. Severity is low as misuse would only expose diagnostic information already available on the system.
From the tool's definition Tool name includes 'list' and description states 'List SMART test results'. The verb 'list' indicates data retrieval with optional filtering by disk name, with no modification or deletion of data.
Attacks that exploit this kind of access
The rule that runs disk_smart_test_list 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 disk_smart_test_list, this is the rule to start with:
disk_smart_test_list is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Truenas, apply this rule, and every disk_smart_test_list call is checked against it from then on.
Questions about disk_smart_test_list
List SMART test results. Optionally filter by disk 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 disk_smart_test_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.
disk_smart_test_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 disk_smart_test_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 disk_smart_test_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.
disk_smart_test_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.
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