Capabilities — Lookout

Surfaces

Surface	Identity
MCP	io.github.SylphxAI/lookout over stdio, npx -y @sylphx/lookout
CLI	lookout
SDK	@sylphx/lookout

Owned capabilities

Capability	Tool	Evidence
Web search	web_search	ranked hits, the adapter name on each hit, adapter warnings
Page fetch	web_fetch	body, redirect list, body-prefix span, SSRF check
Structured extraction	web_extract	title, metadata, JSON-LD, tables, spans
Cache	web_cache	on-disk snapshots; a hit replays an earlier response
Bounded crawl	web_crawl	same-origin, depth and page limits
Multi-step read	web_research	search, then fetch and extract (default 3, maximum 6). Not called by web_search
Snapshot diff	web_diff	added and removed words; lists capped at 200, counts are full

Evidence contract

Search hits name a URL and an adapter. Fetch and extract add excerpt spans. Warnings and gaps stay on the result. See EVIDENCE_CONTRACT.md.

Not owned

A required paid search API, browser rendering, a model-written summary as the evidence, and evidence that is not from the web.