Critical failures across all dimensions. The single tool 'API-{operationId}' has an empty input schema with no properties, no required fields, and additionalProperties=true. The description is generic boilerplate ('Dynamically generated tools from OpenAPI operations...') that does not explain WHAT each specific operation does, WHEN to call it, or WHAT it returns. No parameter descriptions exist. No output schema is documented. The tool name pattern 'API-{operationId}' is not verb-based and does not follow verb_noun conventions (e.g., 'get_', 'create_', 'list_'). The schema is effectively a catch-all that forces LLMs to guess parameter names and types from the OpenAPI spec at runtime, a fundamental violation of the tool definition contract. This server generates tools dynamically from OpenAPI specs, but the MCP tool registration itself is severely underspecified.

• Generate explicit MCP tool definitions for each OpenAPI operation with verb-based names (e.g., 'list_pets', 'create_pet', 'update_pet_status', 'delete_pet'). Extract the operation's summary/description and use it as the tool description (10-200 chars).
• For each operation, build a proper JSON Schema input from the OpenAPI parameters. Include type, description, enum constraints, and min/max for each parameter. Do not use additionalProperties=true.
• Document the output schema for each tool. Extract the 200/201 response schema from the OpenAPI spec and describe the fields the LLM needs (e.g., 'Returns: {id, name, status, created_at}').
• Add per-parameter descriptions extracted from the OpenAPI parameter descriptions. If a parameter has an enum, include it in the description or as a JSON Schema enum constraint.
• Implement error handling guidance: when an operation fails, return a message like 'Invalid status: got "pending", must be one of: available, pending, sold. Try again with a valid status.' instead of raw HTTP errors.