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 inter...
This record as markdown: /tools/com-finn-www-auto/search-vehicles.md
What search_vehicles does on FINN Auto - Car Subscription
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.
| Parameter | Type | Required | Description |
|---|---|---|---|
sort | string | — | Sort order: asc/desc by price, availability, or last_added |
fuels | array | — | Fuel types in German (e.g. ["Elektro", "Benzin", "Diesel", "Plug-In-Hybrid"]) |
limit | number | — | Number of results (1-10, default 5) |
terms | array | — | Subscription term lengths in months (available: 1, 6, 12, 18, 24, 36) |
brands | array | — | Car brands (e.g. ["BMW", "Audi", "Mercedes-Benz"]) |
colors | array | — | Colors in German (e.g. ["Schwarz", "Weiß", "Blau"]) |
models | array | — | Car models (e.g. ["iX1", "3er Limousine"]) |
cartypes | array | — | Car types in German (e.g. ["SUV", "Kombi", "Kleinwagen", "Van"]) |
has_deals | boolean | — | Filter for cars with special deals/discounts |
has_hitch | boolean | — | Filter for cars with hitch |
max_power | number | — | Maximum power in kW |
max_price | number | — | Maximum monthly price in EUR |
Parameters from the server's own tool schema.
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 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 signalsHigh parameter count (19 properties)
Attacks that exploit this kind of access
The rule that runs search_vehicles safely
PolicyLayer is an MCP gateway: it sits between your AI agents and FINN Auto - Car Subscription, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For search_vehicles, this is the rule to start with:
search_vehicles is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect FINN Auto - Car Subscription, apply this rule, and every search_vehicles call is checked against it from then on.
Questions about 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. It is categorised as a Read tool in the FINN Auto - Car Subscription MCP Server, which means it retrieves data without modifying state.
search_vehicles accepts 12 parameters: sort, fuels, limit, terms, brands, colors, models, cartypes, has_deals, has_hitch, max_power, max_price. The full parameter table on this page comes from the server's own tool schema.
Register the FINN Auto - Car Subscription MCP server in PolicyLayer and add a rule for search_vehicles: 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 FINN Auto - Car Subscription. Nothing to install.
search_vehicles 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 search_vehicles 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 search_vehicles. 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.
search_vehicles is provided by the FINN Auto - Car Subscription MCP server (https://www.finn.com/api/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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