iscsi_targetextent_list

List all iSCSI target-to-extent mappings

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/iscsi-targetextent-list.md

WHAT IT DOES

What iscsi_targetextent_list does on Truenas

AI agents call iscsi_targetextent_list 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 iscsi_targetextent_list is rated Low

This tool retrieves and queries existing iSCSI target-to-extent mapping configurations from TrueNAS SCALE without performing any side effects, modifications, or destructive operations. It is a pure read operation that gathers information about storage configuration state.

From the tool's definition Tool name contains 'list' and description explicitly states 'List all iSCSI target-to-extent mappings' with no modification, deletion, or execution capability.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

iscsi_targetextent_list Allowed

iscsi_targetextent_list 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": {
    "iscsi_targetextent_list": {}
  }
}

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 iscsi_targetextent_list call is checked against it from then on.

FAQ

Questions about iscsi_targetextent_list

What does the iscsi_targetextent_list tool do? +

List all iSCSI target-to-extent mappings. 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 iscsi_targetextent_list? +

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

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

Can I rate-limit iscsi_targetextent_list? +

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

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

iscsi_targetextent_list 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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