Purpose: List emails received (inbox) by your Resend receiving address. Use for
AI agents call list-received-emails to retrieve information from Email Sending MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries email data from an inbox without creating, modifying, deleting, executing operations, or committing financial transactions. It is a straightforward data retrieval operation with no side effects, fitting the Read category. The low severity reflects minimal blast radius—an AI misuse would only expose existing email contents, not enable destructive or financial harm.
From the tool's definition Tool name is 'list-received-emails' and description states it 'List emails received (inbox) by your Resend receiving address'. The verb 'list' and the retrieval operation of reading inbox contents indicate a read-only query with no data modification.
Documented attack patterns abuse exactly the kind of access list-received-emails gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Email Sending MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for list-received-emails:
{
"version": "1",
"default": "deny",
"tools": {
"list-received-emails": {}
}
}list-received-emails is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Purpose: List emails received (inbox) by your Resend receiving address. Use for. It is categorised as a Read tool in the Email Sending MCP MCP Server, which means it retrieves data without modifying state.
Register the Email Sending MCP server in PolicyLayer and add a rule for list-received-emails: 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 Email Sending MCP. Nothing to install.
list-received-emails is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list-received-emails 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.
Set action: deny in the PolicyLayer policy for list-received-emails. 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.
list-received-emails is provided by the Email Sending MCP server (resend/resend-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 77 Email Sending MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
77 Email Sending MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.