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Link control answers a narrow question: may this link or domain appear at this boundary. It governs inbound and outbound links based on the policy you configure. Anthale applies link control from the policy you configure. Your allowed list and blocked list define the explicit domain rules for the input or output path. Anthale also applies built-in malicious-domain coverage and a built-in well-known good-domains set where that option is available in policy configuration. This page explains how Anthale applies those built-in sets. It does not document the current contents of the malicious-domain or well-known good-domains sets as separate public reference pages.

What makes it different

This guardrail follows your allowed list, your blocked list, and the platform’s malicious-domain coverage. There is no sensitivity tuning.

Where it matters

Link control matters anywhere links can enter or leave the runtime path: user input, retrieved pages, tool results, file parsing, and model output. It is one of the clearest controls for stopping link-based data exfiltration and reducing indirect prompt-injection exposure.

How to design domain rules

Start with the domains your product actually needs. If a domain is not necessary for your prompts, retrieved context, tool results, or model responses, do not allow it because it feels familiar or widely used. If your product benefits from common documentation or infrastructure domains, the well-known-domain option can reduce maintenance. If the workflow is tighter, keep the rule set narrower and more explicit. Use the blocked list for domains that should never appear, including subdomains inside an otherwise allowed parent. This is where internal-only destinations, unsafe destinations, or competitor references often belong. Keep malicious-domain blocking on unless you have a strong reason not to. The built-in malicious-domain set exists to catch domains you would not think to enumerate one by one. Check both the input and output paths. A domain can arrive from user text, retrieved pages, or tool output, and it can leave through model output.

What it does not replace

Link control does not replace Prompt Injection Protection or Data Leakage Prevention. It tells you whether a domain should appear. It does not explain whether the surrounding prompt is trying to seize control or whether the content being moved is sensitive.

Next steps

Next, read Data Leakage Prevention or return to Guardrails Overview.
Last modified on March 19, 2026