This is a framework/SDK for building MCP apps, NOT a functional MCP server. The provided source code shows only package.json files from example projects and monorepo configuration. No actual tool definitions, schemas, or implementations are visible. The single tool listed ('tool') is labeled as a 'Base tool builder interface', a utility class, not a concrete MCP tool. No input schemas, no parameter descriptions, no output documentation visible anywhere in the source provided. The repo appears to be a development kit for creating MCP servers, not a server itself. It cannot be meaningfully scored against the tool quality rubric because no actual tools exist in the source.

• Clarify that this is a development kit. If evaluating as a framework, provide example output of a fully-built tool with all schemas, descriptions, and error handling.
• If a canonical example server exists, provide its source code instead of monorepo configuration files.
• Document the tool builder's API: what methods exist, what parameters each accepts, what types are returned, what constraints apply.
• Provide actual example tool definitions generated by or using this kit, with full schemas and parameter descriptions visible.
• Add docstrings to all builder methods explaining their purpose and parameters.