Single tool with minimal definition quality. Tool name 'get_knowledge_base' follows verb_noun convention (+), but description is generic and lacks actionable context. Input schema is empty object {} with no parameters documented. Output is unstructured string rather than structured JSON. No parameter descriptions, no error recovery guidance, no pagination support despite returning potentially large knowledge base. Tool lacks idempotency hints, permission declarations, and security context. Descriptions do not explain WHEN to use this tool vs alternatives or what prerequisites exist.

• Define input schema with optional parameters: 'category' (enum of KB categories), 'limit' (1-100, default 20), 'offset' (0+, default 0). Add descriptions for each parameter explaining valid values and constraints.
• Rewrite tool description to 50-150 characters explaining: 'Retrieve Q&A pairs from the knowledge base. Use this to answer company policy questions. Returns paginated results with total count.' Include WHEN to use it.
• Change output from string to structured JSON: {"total": int, "items": [{"question": string, "answer": string, "category": string}], "offset": int, "limit": int}. Document this schema in tool description.
• Add optional 'category' parameter (enum) to filter KB by topic (e.g. 'vacation', 'benefits', 'remote-work'). Return category in each result for chaining.
• Replace error strings with structured errors: {"error": "file_not_found", "message": "Knowledge base file not found at data/kb.json", "recovery": "Ensure kb.json exists in the data directory."}. Categorize as retryable vs fatal.