nfs_share_create

Create a new NFS share/export

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/nfs-share-create.md

WHAT IT DOES

What nfs_share_create does on Truenas

AI agents use nfs_share_create 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 nfs_share_create is rated Medium

This tool creates a new NFS share, which modifies system configuration by adding a new network export. While reversible (the share can be deleted), the creation of NFS shares exposes storage resources to the network and can have significant blast radius if misconfigured—for example, exporting sensitive data with overly permissive access controls.

From the tool's definition Tool name 'nfs_share_create' and description 'Create a new NFS share/export' indicate creation of a new networked filesystem share, which is a reversible modification of system configuration.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

nfs_share_create Rate-limited

nfs_share_create 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": {
    "nfs_share_create": {
      "limits": [
        {
          "counter": "nfs_share_create_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 nfs_share_create call is checked against it from then on.

FAQ

Questions about nfs_share_create

What does the nfs_share_create tool do? +

Create a new NFS share/export. 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 nfs_share_create? +

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

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

Can I rate-limit nfs_share_create? +

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

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

nfs_share_create 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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