zernio_list_audiences

List all custom audiences available for ad targeting.

SERVERZernio SOURCEeyalm321/zernio-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/eyalm321-zernio-mcp/zernio-list-audiences.md

WHAT IT DOES

What zernio_list_audiences does on Zernio

AI agents call zernio_list_audiences to retrieve information from Zernio without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why zernio_list_audiences is rated Low

This tool queries and retrieves existing audience data for ad targeting purposes. It performs a read-only operation without creating, modifying, deleting, or executing any changes. The blast radius of misuse is minimal—an attacker could only enumerate available audiences, which is low-risk metadata disclosure.

From the tool's definition Tool name contains 'list' and description states 'List all custom audiences' — a retrieval operation with no modification or side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs zernio_list_audiences safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Zernio, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For zernio_list_audiences, this is the rule to start with:

zernio_list_audiences Allowed

zernio_list_audiences is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "zernio_list_audiences": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Zernio, apply this rule, and every zernio_list_audiences call is checked against it from then on.

FAQ

Questions about zernio_list_audiences

What does the zernio_list_audiences tool do? +

List all custom audiences available for ad targeting. It is categorised as a Read tool in the Zernio MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on zernio_list_audiences? +

Register the Zernio MCP server in PolicyLayer and add a rule for zernio_list_audiences: 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 Zernio. Nothing to install.

What risk level is zernio_list_audiences? +

zernio_list_audiences is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit zernio_list_audiences? +

Yes. Add a rate_limit block to the zernio_list_audiences 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.

How do I block zernio_list_audiences completely? +

Set action: deny in the PolicyLayer policy for zernio_list_audiences. 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.

What MCP server provides zernio_list_audiences? +

zernio_list_audiences is provided by the Zernio MCP server (eyalm321/zernio-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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