system_version
Get the TrueNAS version string. Lightweight alternative to system_info when you only need the version.
This record as markdown: /tools/spranab-truenas-mcp/system-version.md
What system_version does on Truenas
AI agents call system_version 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 system_version is rated Low
This tool retrieves system version information without creating, modifying, deleting, or executing any operations. It is a simple read-only query with no blast radius if misused by an AI agent, as it only returns metadata about the system state.
From the tool's definition Tool name and description both indicate a retrieval-only operation: 'Get the TrueNAS version string' with no modification or side effects. Described as a 'lightweight alternative' for querying version information.
Risk signalsAdmin/system-level operation
Attacks that exploit this kind of access
The rule that runs system_version 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 system_version, this is the rule to start with:
system_version 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 system_version call is checked against it from then on.
Questions about system_version
Get the TrueNAS version string. Lightweight alternative to system_info when you only need the version. 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 system_version: 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.
system_version 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 system_version 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 system_version. 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.
system_version 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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