# search_vehicles

Search available cars on FINN with filters. Returns matching vehicles with prices, images, and links. All filter values use German names (e.g. "Elektro" not "Electric", "Schwarz" not "Black"). IMPORTANT: Always show detail_url as a clickable link for each vehicle. The vehicle_id field is an internal API identifier for get_vehicle_details — never display it to users.

Agent View of the PolicyLayer registry record for `search_vehicles`. HTML page: https://policylayer.com/tools/com-finn-www-auto/search-vehicles

## Facts

- Tool: `search_vehicles`
- Server: FINN Auto - Car Subscription (`https://www.finn.com/api/mcp`) — https://policylayer.com/tools/com-finn-www-auto.md
- Homepage: https://github.com/finn-auto/finn-auto-ui-frontend
- Risk category: Read (Low risk)
- Registry record: grade C, identity unverified
- Server auth posture: open
- Server CORS policy: *
- Server rate-limited: no
- Parameters: 12
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `sort` | string | no | Sort order: asc/desc by price, availability, or last_added |
| `fuels` | array | no | Fuel types in German (e.g. ["Elektro", "Benzin", "Diesel", "Plug-In-Hybrid"]) |
| `limit` | number | no | Number of results (1-10, default 5) |
| `terms` | array | no | Subscription term lengths in months (available: 1, 6, 12, 18, 24, 36) |
| `brands` | array | no | Car brands (e.g. ["BMW", "Audi", "Mercedes-Benz"]) |
| `colors` | array | no | Colors in German (e.g. ["Schwarz", "Weiß", "Blau"]) |
| `models` | array | no | Car models (e.g. ["iX1", "3er Limousine"]) |
| `cartypes` | array | no | Car types in German (e.g. ["SUV", "Kombi", "Kleinwagen", "Van"]) |
| `has_deals` | boolean | no | Filter for cars with special deals/discounts |
| `has_hitch` | boolean | no | Filter for cars with hitch |
| `max_power` | number | no | Maximum power in kW |
| `max_price` | number | no | Maximum monthly price in EUR |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "search_vehicles",
    "arguments": {}
  }
}
```

## Why search_vehicles is rated Low

This tool searches and retrieves vehicle information (cars, prices, specs, images, links) but performs no side effects, modifications, deletions, or external operations. It is a read-only query operation that returns filtered results from an existing catalog.

From the tool's own definition: "Tool description states: 'Search available cars on FINN with filters. Returns matching vehicles with prices, images, and links.' The primary function is to retrieve and display vehicle data without modification."

Risk signals: High parameter count (19 properties)

## Use case

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

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches FINN Auto - Car Subscription:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "search_vehicles": {}
  }
}
```

## Other tools on FINN Auto - Car Subscription (4)

- `get_available_filters` — Read — https://policylayer.com/tools/com-finn-www-auto/get-available-filters.md
- `get_internal_link_url` — Read — https://policylayer.com/tools/com-finn-www-auto/get-internal-link-url.md
- `get_subscription_pricing` — Read — https://policylayer.com/tools/com-finn-www-auto/get-subscription-pricing.md
- `get_vehicle_details` — Read — https://policylayer.com/tools/com-finn-www-auto/get-vehicle-details.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=com-finn-www-auto · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/com-finn-www-auto