system_config_upload

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/system-config-upload.md

WHAT IT DOES

What system_config_upload does on Truenas

AI agents use system_config_upload 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 system_config_upload is rated Medium

This tool uploads and restores system configuration files, which modifies system settings reversibly (configurations can be changed again). While restoration of configs is a Write operation rather than Destructive (since configs are not permanently deleted—they can be reconfigured), the blast radius is high because incorrect or malicious configurations could severely compromise system security, availability, or…

From the tool's definition Tool name 'system_config_upload' and description 'Upload a system configuration file to restore settings' indicates modification of system configuration state.

Risk signalsAdmin/system-level operation

Attacks that exploit this kind of access

RECOMMENDED RULE

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

system_config_upload Rate-limited

system_config_upload 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": {
    "system_config_upload": {
      "limits": [
        {
          "counter": "system_config_upload_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 system_config_upload call is checked against it from then on.

FAQ

Questions about system_config_upload

What does the system_config_upload tool do? +

Upload a system configuration file to restore settings. Note: this endpoint typically expects a multipart file upload which may not be fully supported via the REST JSON client. Use the TrueNAS web UI for reliable config restores. 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 system_config_upload? +

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

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

Can I rate-limit system_config_upload? +

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

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

system_config_upload 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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