searxng-mcp has 7 tools with mostly complete schemas and descriptions. Tool names follow verb_noun convention (search, fetch, crawl, clear). Descriptions are present and adequate (50-150 chars typical). However, several parameters lack type constraints (enums for category, time_range, domain_profile), and output schemas are not documented in the source. Error handling guidance is absent. The 'clear_cache' tool is destructive but has no confirmation pattern. Parameter descriptions are generic ('Search query' vs 'Natural language search query, 2-500 chars'). No per-tool output schema documentation visible.

• Add enum constraints to 'category' (e.g., 'general', 'images', 'news', 'social'), 'time_range' (e.g., 'day', 'week', 'month', 'year'), and 'domain_profile' (e.g., 'homelab', 'dev', 'default'). Replace free-form strings with JSON Schema enums.
• Document output schemas for all tools. Specify: search returns [{url, title, snippet, score}, ...]; fetch_url returns {content, status_code, error?}; domain_stats returns {tier, success_rate, ...}. Include in tool descriptions or a separate schema reference.
• Enhance parameter descriptions with constraints. E.g., 'query: Natural language search string, 2 - 500 characters. Use for broad topics; for exact phrases, wrap in quotes.' instead of 'Search query'.
• Add confirmation pattern to clear_cache: require a 'confirm: true' parameter or return a dry-run result first. Document: 'This operation is irreversible. Pass confirm=true to proceed.'
• Add error recovery guidance to fetch_url and crawl_site. E.g., 'If fetch fails with 403, the site may block automated access. Try a different domain or use search_and_fetch instead.'

Inferred effective spec: 2025-06-18+.

• Relies on Stateful initialize / Mcp-Session-Id (removed; protocol is stateless) - make each request self-contained