This server has critical definition failures. The single tool 'execute_skill_action' has no visible input schema, no parameter descriptions, and a generic 2-word description. The mcp_server.py file does not implement the MCP protocol, it merely prints a JSON status message and exits. There is no tool registration, no schema validation, no error handling, and no actual MCP message loop. The client.py and example_usage.py are standalone Python code unrelated to MCP. This is not a functional MCP server.

• Implement a proper MCP message loop in mcp_server.py that reads JSON-RPC requests from stdin, dispatches to tool handlers, and writes responses to stdout.
• Define a complete JSON Schema for execute_skill_action inputs: db_connection_uri (string, required, description: 'PostgreSQL/MySQL connection URI'), query_tables (array of strings, required, description: 'List of table names to include in schema transformation').
• Expand tool description to 50-150 characters explaining: what it does (transforms DB schema to LLM-friendly markdown), when to use it (before querying a database), and what it returns (token count, compressed schema, query readiness flag).
• Add parameter descriptions: 'db_connection_uri: Database connection string (e.g., postgresql://user:pass@host:5432/dbname). Must be a valid URI.' and 'query_tables: Array of table names to include. If empty, all tables are included.'
• Add error handling: return structured errors with actionable guidance, e.g. 'Connection failed: invalid URI format. Expected postgresql://user:pass@host:port/dbname' or 'Table not found: users. Available tables: [list]'.