Server has 6 tools with basic descriptions and schemas, but significant gaps in parameter documentation, error guidance, and output structure. All tools have descriptions (10-200 chars), but most parameter descriptions are minimal or missing. Schemas are present but lack detail. Error handling returns generic messages without recovery guidance. No tool annotations (readOnlyHint/destructiveHint). Output schemas are not documented. The server mixes read-only and destructive operations without clear separation or confirmation patterns.

• Add tool annotations: mark search_wikipedia and search_web with readOnlyHint=true; mark create_markdown_report, add_to_database, load_pdf_to_database, generate_graph with destructiveHint=true.
• Document output schemas for all tools. E.g., search_wikipedia should return {success: bool, summary: string, source: string}; generate_graph should return {success: bool, filepath: string, chart_type: string}.
• Enhance error messages with recovery guidance. E.g., 'Error: Database index files not found. Call load_pdf_to_database() with a PDF path to initialize.' or 'Ambiguous term. Try search_web() for more specific results.'
• Add parameter validation and constraints. E.g., chart_type should be an enum ['bar', 'line', 'pie']; filename must end with .png or .md; data_json must be valid JSON with numeric values.
• Implement confirmation pattern for destructive operations. E.g., add a 'confirm' parameter (default false) to create_markdown_report and generate_graph, or return a confirmation token requiring a second call.