AI agents call fly_list_machines 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 |
|---|---|---|---|
api_key | string | — | |
app_name | string | Yes | |
include_deleted | boolean | — |
Parameters from the server's own tool schema.
This tool queries and returns information about existing machines in a Fly.io application. It performs a read-only operation that retrieves data without creating, modifying, deleting, or executing actions. The blast radius is minimal—an agent could discover what machines exist in an app, but cannot change infrastructure or cause harm directly.
From the tool's definition Tool name 'fly_list_machines' and description 'List all machines in a Fly.io app' indicate a retrieval operation with no side effects.
Risk signalsHandles credentials or secrets (api_key)
Attacks that exploit this kind of access
List all machines in a Fly.io app. It is categorised as a Read tool in the UnClick MCP Server, which means it retrieves data without modifying state.
fly_list_machines accepts 3 parameters: api_key, app_name, include_deleted. Required: app_name. 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 fly_list_machines: 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.
fly_list_machines 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 fly_list_machines 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 fly_list_machines. 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.
fly_list_machines 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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