Single tool with solid fundamentals but moderate limitations. Tool name 'query_knowledge_base' follows verb_noun convention. Description is present (107 chars, within 10-1024 baseline) and explains the function. Input schema has proper types and descriptions for all parameters. However, output schema is not documented in visible source, and error handling guidance is absent. Tool follows read-only safety pattern appropriately.

• Document the return schema explicitly: list response fields (e.g., documents: [{id, content, score, source}]), indicate pagination support (limit, offset, total_count), and state result limit (e.g., 'capped at 50 results').
• Add error handling guidance to tool description: 'Returns empty results if no documents match. If query syntax fails, try simplifying or removing special characters. Timeout errors indicate service overload, retry after 5s.'
• Add range constraint to topK: change description to 'Number of results to return (1-100, default: 5)' and add minValue/maxValue in schema if supported by framework.
• Rename useHybrid to use_hybrid for consistency with snake_case MCP naming convention.
• Add explicit recovery hints: 'If results are irrelevant, try using different keywords or reduce topK to focus on highest-confidence matches.'