vm_get

Get detailed information about a specific VM by its numeric ID.

SERVERTruenas SOURCEspranab/truenas-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/spranab-truenas-mcp/vm-get.md

WHAT IT DOES

What vm_get does on Truenas

AI agents call vm_get 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.

RISK

Why vm_get is rated Low

This tool retrieves or queries data about a virtual machine without creating, modifying, deleting, or executing any operations. It is a read-only action that returns information about an existing VM identified by numeric ID, consistent with the 'Read' category for data retrieval operations with no side effects.

From the tool's definition Tool name 'vm_get' and description 'Get detailed information about a specific VM by its numeric ID' clearly indicate a retrieval operation with no modification of system state.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

vm_get Allowed

vm_get is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "vm_get": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Truenas, apply this rule, and every vm_get call is checked against it from then on.

FAQ

Questions about vm_get

What does the vm_get tool do? +

Get detailed information about a specific VM by its numeric ID. It is categorised as a Read tool in the Truenas MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on vm_get? +

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

vm_get is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit vm_get? +

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

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

vm_get 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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