This server has severe definition quality issues. Tool definitions are minimal and lack critical metadata. execute_skill_action has no visible input schema in the source code (only a description string). run_digital_dealer_auction has a schema visible in the evaluation metadata, but the actual tool registration in mcp_server.py does not show explicit schema definitions, only a hardcoded JSON response. Descriptions are present but generic (10-50 chars). No error handling guidance, no output schema documentation, no parameter validation rules. The server appears to be a mock/stub implementation rather than a production-ready MCP server.

• Implement proper MCP tool registration with explicit schema definitions for all parameters. Use JSON Schema with type, description, and constraints for each parameter.
• Add comprehensive input validation. For run_digital_dealer_auction: validate VIN format (17 chars), vehicle_desc non-empty, starting_bid_eur > 0 and reasonable range (e.g., 1000 - 500000 EUR).
• Document output schema for run_digital_dealer_auction. Define each field type and meaning: auction_event_id (string), certified_condition_cos_check_score (number 0 - 100), dealer_network_bidding_concurrency (integer), etc.
• Rename execute_skill_action to a specific verb_noun pair (e.g., execute_auction_remarketing or initiate_dealer_auction) that clearly conveys the action.
• Add error handling with recovery guidance. E.g., if VIN is invalid, return: 'Invalid VIN format (expected 17 alphanumeric chars). Example: WBA33AY08NFP10293'. If starting_bid_eur is out of range, suggest valid bounds.