BrewSource provides three well-named, read-only tools with reasonable descriptions and formal input schemas. However, there are significant gaps in parameter descriptions, output schema documentation, and error handling guidance. Tool names follow verb_noun convention (bjcp_lookup, search_beers, find_breweries) which is good. Descriptions are adequate (57-93 chars) but lack strategic guidance about when to use each tool vs. alternatives. Input schemas are present with type definitions but parameter descriptions are terse or missing detail about format/constraints. Output schemas are entirely undocumented, the LLM has no visibility into what fields are returned, which violates pattern:tool and blocks downstream tool composition. No explicit error recovery guidance. The lack of documentation around pagination limits (mentioned in schema as 'default: 20, max: 100') in the tool description itself is a missed opportunity. Overall, the server demonstrates competent foundational tool design but lacks the polish needed for production-grade agent integration.

• Document output schemas for all three tools. For bjcp_lookup, specify returned fields (e.g., style_id, style_code, style_name, category, subcategory, origin, ibu_range, abv_range, og_range, fg_range, description). For search_beers and find_breweries, document all returned fields including IDs needed for downstream tool calls.
• Expand parameter descriptions with format and constraint details. E.g., for search_beers, change 'style' description to: 'BJCP style (e.g., '21A' for American IPA, or style name like 'American IPA'). If unsure, call bjcp_lookup first.'
• Add strategic context to tool descriptions. E.g., bjcp_lookup: 'Use this to look up BJCP beer style standards and characteristics. Use search_beers instead to find commercial products. Returns abv range, ibu range, origin, and typical flavors.'
• Document pagination explicitly in tool descriptions. E.g., 'Returns up to 20 results by default (max 100). Pass limit to override. No next_token or cursor support, use offset or page number if querying beyond the first page.'
• Clarify parameter relationships in descriptions. For find_breweries: 'Provide one or more filters: name (exact or partial match), city/state/country (all filters are AND-combined), or a general location string. If both location and city/state are provided, city/state takes precedence.'
• Add error recovery hints. E.g., 'If search_beers returns zero results for a style name, try bjcp_lookup to confirm the exact BJCP style code, then retry search_beers.'
• Define per-parameter type and length constraints in descriptions. E.g., 'name: string, 1-100 characters, case-insensitive partial match.' 'limit: integer, 1-100, default 20.'

Inferred effective spec: <=2025-11-25.

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