The server defines 12 tools with explicit input schemas and descriptions visible in the source code. However, critical gaps emerge: (1) Output schemas are entirely undocumented, none of the 12 tools specify what fields or structure they return, forcing LLMs to infer results blindly. (2) Several parameter descriptions lack actionable constraints (e.g., 'account_id' described only as 'Ad account ID (e.g., act_123456789)' with no validation rules or format specification). (3) Error handling is absent, no tool documents how to recover from failures, what makes an input invalid, or when to retry vs. escalate. (4) The two write operations (create_multi_asset_ad, create_adset) are richly described but lack confirmation-before-execute safeguards; agents could accidentally create duplicate ad sets or malformed ads. (5) Many read-only tools accept optional filtering parameters but do not document pagination behavior or result limits, tools like get_ads and get_adsets accept a 'limit' parameter but the description does not state the maximum, default, or what happens if limit exceeds API boundaries. Baseline: average tool description length is 194 chars; most tools here cluster around 150 - 250 chars (acceptable range), but descriptions focus on WHAT the tool does, not WHEN to use it or dependencies. Output schemas are completely missing, which is a critical gap per the rubric (100% of A+ tools document return types). Tool names follow verb_noun convention (run_setup_check, get_ad_accounts, create_adset) and are mostly clear, but naming consistency could improve (e.g., discover_all_accounts is unique; a parallel resource discovery tool using list_ would be more predictable).

• Document output schemas for all 12 tools. For each tool, specify the return type (object/array), field names, types, and which fields enable chaining to downstream tools. Example: get_ad_accounts should return {accounts: [{id: string, name: string, status: string, ...}], total_count: number, next_cursor: string | null}.
• Add pagination documentation to get_ad_accounts, get_ads, and get_adsets. Specify default limit (recommend 20 - 50), max limit, whether results include total_count/next_cursor, and how to handle large result sets. Update descriptions to say 'Returns max N results per page; use cursor/offset for additional pages.'
• Implement confirmation-before-execute for create_multi_asset_ad and create_adset. Add a 'dry_run' boolean parameter (default false) or a separate 'preview_adset' and 'preview_ad' tools that return what would be created without side effects. This prevents accidental duplicate creation.
• Add error handling section to each tool description. Document failure modes (e.g., 'If account_id is invalid, returns {status: "error", code: "invalid_account_id", message: "Account not found. Check that account_id starts with \'act_\' and is accessible to your token."}') and recovery guidance (e.g., 'Try get_ad_accounts to list accessible accounts.').
• Convert free-form string parameters to enums where the set of valid values is known. Replace status_filter descriptions with explicit enum types: status_filter in ['ACTIVE', 'PAUSED', 'ARCHIVED', 'ALL']. Same for placement_mode, copy_mode, audience_mode, optimization_goal in create_adset.

Inferred effective spec: <=2025-11-25.

• Relies on Logging (deprecated) - log to stderr or use OpenTelemetry