list_domains

List all email sending domains in your workspace with health status. Shows verification state, deliverability scores, and active mailbox counts. Enterprise only.

SERVERStarfield SOURCE@adrata/starfield-mcp

Low RISK CLASS

Category Read

Parameters 10 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/adrata-starfield-mcp/list-domains.md

WHAT IT DOES

What list_domains does on Starfield

AI agents call list_domains to retrieve information from Starfield without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

Parameter	Type	Required	Description
`status`	string	—	Filter by status: verified, pending, failed

Parameters from the server's own tool schema.

RISK

Why list_domains is rated Low

Even though list_domains only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs list_domains safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Starfield, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For list_domains, this is the rule to start with:

list_domains Allowed

list_domains 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": {
    "list_domains": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Starfield, apply this rule, and every list_domains call is checked against it from then on.

FAQ

Questions about list_domains

What does the list_domains tool do? +

List all email sending domains in your workspace with health status. Shows verification state, deliverability scores, and active mailbox counts. Enterprise only. It is categorised as a Read tool in the Starfield MCP Server, which means it retrieves data without modifying state.

What parameters does list_domains accept? +

list_domains accepts 1 parameter: status. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on list_domains? +

Register the Starfield MCP server in PolicyLayer and add a rule for list_domains: 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 Starfield. Nothing to install.

What risk level is list_domains? +

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

Can I rate-limit list_domains? +

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

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

list_domains is provided by the Starfield MCP server (@adrata/starfield-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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