Get a paginated list of deleted subscribers for a list
AI agents call get_deleted_subscribers 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 retrieves historical information about deleted subscribers without creating, modifying, deleting, or executing any actions. It is purely a data query operation with no side effects or blast radius. The worst outcome of misuse would be unauthorized access to metadata about previously deleted subscribers, which is a low-severity information disclosure risk.
From the tool's definition Tool name and description indicate it 'Get[s] a paginated list of deleted subscribers for a list' — a retrieval operation with no modification, deletion, or execution capability.
Attacks that exploit this kind of access
Get a paginated list of deleted subscribers for a list. 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_deleted_subscribers: 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_deleted_subscribers 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_deleted_subscribers 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_deleted_subscribers. 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_deleted_subscribers 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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