List all configured voice agents in your Retell account. WHEN TO USE: - Discover available agents before making calls - Find agent IDs by name - Inventory check COMMON MISTAKES: - Guessing agent IDs from names; use the returned agent_id exactly - Choosing an agent without checking its response_en...
AI agents call list_agents to retrieve information from Apple Shortcuts without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves information about existing voice agents without modifying, deleting, or executing any operations. It is purely informational, similar to a list or get operation. The lowest severity applies because listing agents poses minimal risk even if misused by an AI agent.
From the tool's definition Tool description states 'List all configured voice agents in your Retell account' and usage context emphasizes 'Discover available agents' and 'Inventory check' — these are query/discovery operations with no side effects.
Documented attack patterns abuse exactly the kind of access list_agents gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Apple Shortcuts, and nothing reaches the server without passing your rules. This is the rule we recommend for list_agents:
{
"version": "1",
"default": "deny",
"tools": {
"list_agents": {}
}
}list_agents is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List all configured voice agents in your Retell account. WHEN TO USE: - Discover available agents before making calls - Find agent IDs by name - Inventory check COMMON MISTAKES: - Guessing agent IDs from names; use the returned agent_id exactly - Choosing an agent without checking its response_engine.llm_id and versions via get_agent ERROR RECOVERY: - 401: API key is missing or invalid → configure_retell_api_key RELATED TOOLS: - get_agent: Inspect full config for a returned agent_id - get_agent_versions: Check published versions - create_phone_call/create_web_call: Use a verified agent_id RETURNS: agents, count. Each agent usually includes agent_id, agent_name, voice_id, response_engine, and timestamps. It is categorised as a Read tool in the Apple Shortcuts MCP Server, which means it retrieves data without modifying state.
Register the Apple Shortcuts MCP server in PolicyLayer and add a rule for list_agents: 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 Apple Shortcuts. Nothing to install.
list_agents 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 list_agents 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 list_agents. 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.
list_agents is provided by the Apple Shortcuts MCP server (@mindstone/mcp-server-apple-shortcuts). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Apple Shortcuts, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
423 Apple Shortcuts tools catalogued and risk-classified — across an index of 43,000+ MCP servers.