Scored across 5 tools
Each tool has a clearly distinct purpose with no overlap: attachments handles attachments, folders manages mailbox folders, help provides documentation, messages handles email messages, and send sends emails. The descriptions clearly separate their domains, making misselection unlikely.
All tool names follow a consistent snake_case pattern using plural nouns (attachments, folders, messages) or verbs (help, send). This predictable naming scheme makes the tool set easy to navigate and understand.
With 5 tools, this server is well-scoped for email management. Each tool earns its place by covering distinct aspects: folder management, message handling, sending, attachments, and help. The count is neither too thin nor overwhelming for the domain.
The tool set provides comprehensive coverage for core email workflows: reading, searching, organizing, sending, and managing attachments. A minor gap exists in lacking explicit tools for account management (e.g., adding/removing accounts) or advanced message operations like deleting permanently, but agents can work around this with existing tools.