Single tool with complete schema and reasonable description. Tool name lacks action verb (should be 'get_seo_keyword_google_ads_volume'). Description is 380 chars (within 10-1024 range) but includes example values that LLMs may reuse literally. All parameters have types and descriptions. Output schema is documented in code but not exposed to callers. Error handling is present but generic. No parameter validation constraints (e.g., max 10 keywords stated in description but not enforced via schema maxItems). Secrets properly injected via _apiKey parameter (acceptable pattern for this context, though ideally server-side). Overall: functional but misses several production patterns.

• Rename tool to 'get_seo_keyword_google_ads_volume' to start with action verb and improve LLM intent recognition.
• Add 'maxItems': 10 to keywords array schema and remove example values from description; replace with formal constraints.
• Document output schema in tool definition: { type: 'object', properties: { location_code: { type: 'integer' }, language_code: { type: 'string' }, keywords: { type: 'array', items: { type: 'object', properties: { keyword, search_volume, competition, cpc } } } } }.
• Enhance error messages with actionable recovery steps: 'Invalid API key format. Expected base64(login:password). Verify credentials at dataforseo.com and re-encode.'
• Add 'minItems': 1 to keywords array to prevent empty arrays and validate early in callTool before API call.