Argus demonstrates solid definition quality with consistently good tool naming (all verb-prefixed), comprehensive parameter descriptions, and well-documented input schemas. All 7 tools follow the verb_noun pattern (search_*, suggest, spellcheck). Descriptions are detailed and exceed the 194-char baseline average. Parameter schemas are complete with type definitions and descriptions for all parameters. However, output schemas are entirely undocumented, the code shows no explicit return type documentation in tool definitions. Additionally, error handling lacks recovery guidance (no 'try X instead' messages), and there is no mention of rate limiting, timeouts, or partial failure handling. Security posture is good (API keys injected via ContextVar, not exposed as parameters), but lacks explicit permission documentation and audit trail guidance.

• Document output schemas for all 7 tools. Include field names, types, and a description of each field. Example: 'Returns {results: [{title: string, url: string, snippet: string}], count: integer, total: integer}'
• Add error handling with recovery guidance. Wrap API calls in try-catch, categorize errors (retryable/user-fixable/fatal), and include actionable messages: 'API rate limit exceeded. Retry in 60 seconds.' or 'Invalid query: max 50 words. Your query has 67 words, trim the query and retry.'
• Convert parameter constraints to enums where applicable. For 'country', 'search_lang', and 'freshness', declare JSON Schema enums instead of relying on description text. E.g., 'freshness': {'type': 'string', 'enum': ['pd', 'pw', 'pm', 'py'], 'description': '...'}
• Document Brave API plan requirements in tool descriptions. Example: 'Requires Data for Search plan (default 10k token limit). Consider search_news() or search_videos() for specialized searches to conserve tokens.'
• Add explicit timeout and rate-limit guidance. Example: 'API calls timeout after 30 seconds. If you receive a timeout, retry up to 2 times with 5-second backoff. If still failing, use a simpler query.'
• Implement per-item error reporting for batch or multi-result operations. If one search result fails to fetch metadata, return partial results with a 'partial_failure' flag and error details per item, not a complete blanket failure.
• Add pagination examples to tool descriptions for tools with 'count' or 'offset' parameters. Example: 'To paginate, use offset=0 (first 10), offset=10 (next 10), etc. Stop when results_returned < count or error returned.'

Inferred effective spec: 2026-07-28+.

• Relies on Logging (deprecated) - log to stderr or use OpenTelemetry