resend_list_domains

What resend_list_domains does on Integrations MCP

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

Why resend_list_domains is rated Low

This tool queries and returns existing domain configuration data from Resend (an email service provider). It performs a read-only operation that retrieves information without creating, modifying, deleting, or executing any actions. The blast radius of misuse is minimal — an AI agent could only view domain configurations, which typically contains non-sensitive metadata about which domains are authorized for sending.

From the tool's definition Tool name contains 'list' and description states 'List all sending domains configured in Resend' — a pure retrieval operation with no data modification or side effects.

The rule that runs resend_list_domains safely

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

{
  "version": "1",
  "default": "deny",
  "tools": {
    "resend_list_domains": {}
  }
}

Questions about resend_list_domains