Wikipedia

Look up encyclopedia articles. Backed by the wikipedia extension hitting the public MediaWiki + REST APIs. No key.

Use when

• "Who / what is X?" — factual lookup with a canonical source
• "Summarize the Wikipedia article on Y"
• "Search Wikipedia for Z"
• Grounding for long-form answers before calling summarize

Do not use when

• Real-time / breaking news — use brave-search
• Non-encyclopedic web content — use fetch-url

Tools

• status — default language
• search — query + optional limit (≤20), lang
• summary — REST summary (one paragraph + page URL + thumbnail)
• extract — plaintext intro (sentences, default 10; 0 = full article)

Language

Default via WIKIPEDIA_LANG env (fallback en). Override per-call with lang. Common: en, es, fr, de, pt.