List all topic subscriptions for a contact in Resend (by contact ID or email). Don
AI agents call list-contact-topics 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 queries and retrieves existing subscription topic data for a contact without modifying, executing external operations, or causing destructive changes. It is a straightforward read operation with minimal security risk if misused by an AI agent.
From the tool's definition Tool name 'list-contact-topics' and description 'List all topic subscriptions for a contact' indicate data retrieval only. The verb 'list' is a query operation with no side effects.
Documented attack patterns abuse exactly the kind of access list-contact-topics 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-contact-topics:
{
"version": "1",
"default": "deny",
"tools": {
"list-contact-topics": {}
}
}list-contact-topics is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List all topic subscriptions for a contact in Resend (by contact ID or email). Don. 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-contact-topics: 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-contact-topics 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-contact-topics 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-contact-topics. 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-contact-topics 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.
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77 Email Sending MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.