alert_dismiss

Dismiss an alert by its UUID. Dismissed alerts no longer appear as active but can be restored.

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/alert-dismiss.md

WHAT IT DOES

What alert_dismiss does on Truenas

AI agents use alert_dismiss 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 alert_dismiss is rated Medium

Dismissing an alert modifies its state (active → dismissed) but is explicitly reversible since 'dismissed alerts...can be restored' (as evidenced by the sibling tool alert_restore). This is a Write operation with low severity since it only affects alert visibility, not underlying data or system state.

From the tool's definition Dismiss an alert by its UUID. Dismissed alerts no longer appear as active but can be restored.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

alert_dismiss Rate-limited

alert_dismiss 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": {
    "alert_dismiss": {
      "limits": [
        {
          "counter": "alert_dismiss_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 alert_dismiss call is checked against it from then on.

FAQ

Questions about alert_dismiss

What does the alert_dismiss tool do? +

Dismiss an alert by its UUID. Dismissed alerts no longer appear as active but can be restored. 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 alert_dismiss? +

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

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

Can I rate-limit alert_dismiss? +

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

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

alert_dismiss 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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