11 tools with mixed quality. Naming is generally good (verb-noun pattern: get_, create_, search_, list_). Descriptions present but often generic, many lack WHEN to use guidance or prerequisites. Schemas visible for all tools with proper JSON Schema structure, but parameter descriptions are sparse or missing context. No output schemas documented. Error handling minimal, tools return plain strings without recovery guidance. No tool annotations (readOnlyHint/destructiveHint). Database tools lack validation details; YouTube tools lack rate-limit or quota documentation.

• Document output schemas for all tools. Define return fields, types, and examples. E.g., get_active_brand_campaigns should return {campaigns: [{name, industry, budget, brief, target_audience}], total_count}.
• Expand parameter descriptions to 50-150 chars. Include constraints, format, and WHEN to use. E.g., 'Timezone string (e.g., Asia/Singapore, UTC). Defaults to Asia/Singapore if omitted.'
• Add tool annotations: mark get_* and list_* with readOnlyHint=true; mark save_match_result and create_meeting with destructiveHint=true; mark resolve_relative_date with idempotentHint=true.
• Implement structured error responses. Return {status, error, recovery_hint} instead of plain strings. E.g., {status: 'error', error: 'Database not initialized', recovery_hint: 'Run python db_tools.py to initialize'}.
• Document YouTube API quotas and rate limits in tool descriptions. E.g., 'Note: YouTube API quota is 10,000 units/day. This call costs ~100 units. Retry with exponential backoff on 403 quota_exceeded.'
• Add pagination support to list_upcoming_events and search_youtube_creators. Include max_results (default 10, max 50) and return total_count so agents know if more results exist.