Purpose: List all broadcast campaigns (newsletters/bulk emails to audiences) with ID, name, audience, status, timestamps. NOT for: Listing transactional emails (use list-emails). Not for listing segments or contacts (use list-segments, list-contacts). Returns: For each broadcast: id, name, segmen...
AI agents call list-broadcasts 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.
The tool retrieves and queries broadcast campaign information without creating, modifying, deleting, executing code, or moving money. This is a straightforward read operation with minimal security risk—it returns metadata about existing campaigns. No side effects or irreversible actions occur.
From the tool's definition Tool 'lists all broadcast campaigns' returning metadata fields (id, name, segment_id, status, timestamps). Described explicitly as retrieving/querying data with no modification capability.
Documented attack patterns abuse exactly the kind of access list-broadcasts 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-broadcasts:
{
"version": "1",
"default": "deny",
"tools": {
"list-broadcasts": {}
}
}list-broadcasts 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 all broadcast campaigns (newsletters/bulk emails to audiences) with ID, name, audience, status, timestamps. NOT for: Listing transactional emails (use list-emails). Not for listing segments or contacts (use list-segments, list-contacts). Returns: For each broadcast: id, name, segment_id, status, created_at, scheduled_at, sent_at. When to use: User asks. 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-broadcasts: 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-broadcasts 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-broadcasts 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-broadcasts. 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-broadcasts 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.