Both tools have identical, incorrect descriptions ('Add two numbers' for a greeting function). Parameters lack descriptions entirely (null values). No input validation, error handling, or output schema documentation. Tool implementations are trivial stubs (add returns hardcoded 9527; hello returns string despite int return type annotation). No parameter constraints, enums, or guidance. Naming is minimal but acceptable (verb-noun form). This server fails basic quality standards for production use.

• Add non-empty descriptions to every parameter. For 'a' and 'b' in add(), write: 'First integer to add' and 'Second integer to add'. For 'name' in hello(), write: 'User name to greet (string, 1-100 chars)'.
• Replace tool descriptions with accurate, action-focused text. 'add': 'Add two integers and return their sum.' 'hello': 'Greet a user by name and return a personalized greeting message.'
• Document output schemas explicitly. E.g., add() returns int; hello() returns str. Include in docstrings or via schema annotations.
• Fix return type annotation for hello() from int to str to match actual implementation.
• Add input validation and error messages. E.g., for add(), validate that a and b are integers; for hello(), validate name is non-empty and under 100 chars. Return actionable errors like 'Invalid name: must be 1-100 characters'.