smb_config_update

Update global SMB configuration

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/smb-config-update.md

WHAT IT DOES

What smb_config_update does on Truenas

AI agents use smb_config_update 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 smb_config_update is rated Medium

This tool modifies SMB (Samba) global configuration settings on a TrueNAS system. Configuration updates are Write operations because they create or modify settings reversibly. The severity is high because misconfigured SMB settings could disrupt network file sharing, affect security posture, or impact multiple clients accessing the storage system.

From the tool's definition Tool name 'smb_config_update' and description 'Update global SMB configuration' indicate modification of configuration settings. The word 'Update' confirms reversible data modification rather than deletion or destruction.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

smb_config_update Rate-limited

smb_config_update 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": {
    "smb_config_update": {
      "limits": [
        {
          "counter": "smb_config_update_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 smb_config_update call is checked against it from then on.

FAQ

Questions about smb_config_update

What does the smb_config_update tool do? +

Update global SMB configuration. 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 smb_config_update? +

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

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

Can I rate-limit smb_config_update? +

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

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

smb_config_update 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.

KEEP EXPLORING

More on Truenas, and thousands of servers like it.

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All 279 Truenas tools →

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aroflo_create_or_update_record on AroFlo MCP →team_manager_update_budget on Team Manager MCP → The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →