Critical gaps across all dimensions. 8 tools with 5 unique names (3 'hello' duplicates, 2 'time' duplicates) signal poor composition and naming discipline. Descriptions are present but generic (10-80 chars, below 194-char baseline). Schemas visible in code but lack depth: parameters have types and descriptions, but no enums for constrained inputs (e.g., 'operation' in calculate should be enum). No output schemas documented. Error handling absent, no recovery guidance, no categorization. No tool annotations (readOnlyHint/destructiveHint).

• Consolidate 'hello' variants into a single tool with optional 'content' parameter (use oneOf or conditional schema). Same for 'time', merge into one tool with optional 'format' parameter.
• Document output schemas for each tool. E.g., get_weather should return {temperature: number, wind_speed: number, humidity: number}, not a generic Content array.
• Add enum constraint to 'operation' parameter in calculate: {"enum": ["add", "subtract", "multiply", "divide"]}.
• Implement error categorization: wrap errors with metadata (retryable: bool, user_fixable: bool, suggestion: string). Return structured error responses, not raw Go errors.
• Add tool annotations to RegisterTool calls: pass readOnlyHint=true for all current tools, or destructiveHint=true if any tools modify state in future.