This server demonstrates solid definition quality with consistent naming patterns, comprehensive descriptions, and proper schema definitions across all 7 tools. All tools follow verb_noun naming convention (google_ads_get_*, google_ads_list_*). Descriptions are detailed and explain WHEN to use each tool and WHAT it returns. Input schemas are well-structured with proper type constraints, enums, and validation rules. However, there are gaps in output schema documentation (responses are returned as formatted strings rather than structured objects), and some parameter descriptions could be more explicit about constraints and dependencies. Error handling guidance is minimal. The server is well-engineered overall but lacks the exceptional polish of A+ grade tools.

• Define explicit output schemas for each tool. Move from string returns to structured objects. Example: google_ads_list_campaigns should return {accounts: [{id, name, currency, ...}], total_count, next_offset} instead of a formatted string. This enables LLM field extraction, cheaper token usage, and reliable downstream tool chaining.
• Add error handling and recovery patterns to all tool implementations. Wrap external API calls with try/except blocks that return categorized errors: {error_type: 'NOT_FOUND'|'PERMISSION_DENIED'|'RATE_LIMITED'|'INVALID_INPUT', message: '<actionable message>', suggestion: '<what to do next>'}. Example: if customer_id validation fails, return {error_type: 'INVALID_INPUT', message: 'Invalid customer_id format. Must be 10 digits.', suggestion: 'Call google_ads_list_accounts to discover valid account IDs.'}
• Expand google_ads_get_campaign description to 100 - 150 chars explaining when this single-campaign fetch is preferred over list_campaigns, what additional details it reveals, and any prerequisites. Current description is too terse.
• Add minLength, maxLength, and/or pattern validation to campaign_id and ad_group_id parameters. Clarify whether these are numeric strings, have dashes/separators, or follow a specific format. Example: campaign_id: {type: 'string', description: 'Campaign ID (numeric string, e.g., "123456789")', pattern: '^\d+$'}.
• Enhance pagination support: (1) For google_ads_list_accounts, add a next_cursor or offset output field so LLMs know how to fetch more. (2) For google_ads_list_campaigns, document whether limit+offset work as expected or if cursor pagination is needed. (3) Return total_count in responses so agents can decide whether to paginate.