Two tools with minimal documentation. 'multiply' is a trivial arithmetic operation with adequate schema but lacks context for when an LLM should invoke it. 'get_knowledge_base' has a longer description but no input parameters (empty schema), making it impossible to customize behavior. Both tools lack error recovery guidance, and descriptions do not explain prerequisites or failure modes. No tool annotations (readOnlyHint, idempotentHint) despite both being read-only operations. Naming is clear but generic; descriptions are present but below production quality (multiply: 34 chars, get_knowledge_base: 108 chars). No parameter validation rules documented.

• Add readOnlyHint and idempotentHint annotations to both tools in the @mcp.tool() decorator to signal safety properties to LLMs.
• Expand get_knowledge_base schema to accept optional parameters: 'query' (string, search filter), 'limit' (integer, 1-100, default 20), 'format' (enum: 'text'|'json'). Document each parameter.
• Rewrite multiply description to include context: 'Multiply two integers. Use when the LLM needs to perform arithmetic calculations. Returns the product as an integer.'
• Replace error strings in get_knowledge_base with structured error responses: {'error': 'file_not_found', 'message': '...', 'recovery': 'Ensure data/data.json exists and is valid JSON.'}
• Document output schemas explicitly: multiply → {'type': 'integer', 'description': 'The product of a and b'}; get_knowledge_base → {'type': 'string', 'description': 'Formatted Q&A pairs from the knowledge base, one per line.'}