Get canonical FINN URLs for a brand and its models — for building internal linking blocks on SEO pages. For each model returns three URLs that target DIFFERENT funnels: mdp_url (marketing/brand page), plp_subscribe_url (subscription product listing, /de-DE/subscribe/{brand}_{model}), and plp_leas...
Part of the FINN Auto - Car Subscription server.
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AI agents call get_internal_link_url to retrieve information from FINN Auto - Car Subscription without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though get_internal_link_url only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"get_internal_link_url": {}
}
}See the full FINN Auto - Car Subscription policy for all 5 tools.
These attack patterns abuse exactly the kind of access get_internal_link_url gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Get canonical FINN URLs for a brand and its models — for building internal linking blocks on SEO pages. For each model returns three URLs that target DIFFERENT funnels: mdp_url (marketing/brand page), plp_subscribe_url (subscription product listing, /de-DE/subscribe/{brand}_{model}), and plp_leasing_url (leasing product listing, /de-DE/leasing/{brand}_{model}). Use plp_leasing_url when linking from a Leasing advisory, plp_subscribe_url when linking from subscription content. If model is omitted, returns all currently available models for the brand.. It is categorised as a Read tool in the FINN Auto - Car Subscription MCP Server, which means it retrieves data without modifying state.
Register the FINN Auto - Car Subscription MCP server in PolicyLayer and add a rule for get_internal_link_url: 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.
get_internal_link_url 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 get_internal_link_url 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 get_internal_link_url. 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.
get_internal_link_url 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.
Deterministic rules across all 5 FINN Auto - Car Subscription tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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