Get a paginated list of recipients for a journey email
AI agents call get_journey_email_recipients to retrieve information from Campaign Monitor 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 data about email journey recipients without modifying, executing operations, or destructively altering any state. It is a straightforward data retrieval endpoint. Severity is low because reading recipient lists carries minimal risk even if misused—it exposes PII/email data, but does not modify campaigns, delete data, or trigger sends.
From the tool's definition Tool name 'get_journey_email_recipients' and description 'Get a paginated list of recipients for a journey email' indicate a retrieval operation with no side effects. The verb 'Get' and context of retrieving a 'list' are classic Read patterns.
Attacks that exploit this kind of access
Get a paginated list of recipients for a journey email. It is categorised as a Read tool in the Campaign Monitor MCP MCP Server, which means it retrieves data without modifying state.
Register the Campaign Monitor MCP server in PolicyLayer and add a rule for get_journey_email_recipients: 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 Campaign Monitor MCP. Nothing to install.
get_journey_email_recipients 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 get_journey_email_recipients 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 get_journey_email_recipients. 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.
get_journey_email_recipients is provided by the Campaign Monitor MCP server (pauliowest/cmon-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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