High-risk tools in Email Sending MCP
3 of the 77 tools in Email Sending MCP are classified as high risk. This page profiles those tools specifically, with recommended policy actions and the attack patterns that target them.
Every operation listed below is an action PolicyLayer recommends controlling at the transport layer. Open any tool to see the full profile, risk score, and YAML policy snippet.
Tools at high risk
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send-batch-emailsExecute**Purpose:** Send up to 100 transactional emails in one API call. Each item has the same fields as send-email (to, subject, text, from, etc.). **NOT for:** Sending one email (u...
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send-broadcastExecute**Purpose:** Send (or schedule) an existing broadcast by ID. The broadcast must have been created with create-broadcast first. **NOT for:** Sending a new one-off email (use sen...
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send-eventExecute**Purpose:** Fire an event to trigger automations for a specific contact. **When to use:** - User wants to trigger an automation workflow for a contact - Testing an automation ...
Attacks that target this class
High-risk tools in any server share these documented attack patterns. Each links to the full case and the defensive policy.