AI agents call ck_list_subscribers to retrieve information from UnClick without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
to | string | — | |
from | string | — | Filter by created date (ISO 8601) |
page | number | — | |
api_secret | string | Yes | ConvertKit API secret |
sort_field | string | — | |
sort_order | string | — | asc or desc |
Parameters from the server's own tool schema.
This tool retrieves subscriber data from a ConvertKit account without altering, deleting, or executing any operations. While subscriber lists may contain personal information, the act itself is a simple read operation. Severity is low because listing subscribers does not expose financial transactions, execute arbitrary code, or enable destructive actions—it only provides information visibility.
From the tool's definition Tool name contains 'list' and description states 'List all subscribers' — a retrieval operation with no modification or deletion.
Attacks that exploit this kind of access
List all subscribers in a ConvertKit account. It is categorised as a Read tool in the UnClick MCP Server, which means it retrieves data without modifying state.
ck_list_subscribers accepts 6 parameters: to, from, page, api_secret, sort_field, sort_order. Required: api_secret. The full parameter table on this page comes from the server's own tool schema.
Register the UnClick MCP server in PolicyLayer and add a rule for ck_list_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 UnClick. Nothing to install.
ck_list_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 ck_list_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 ck_list_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.
ck_list_subscribers is provided by the UnClick MCP server (@unclick/mcp-server). 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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