list_diagrams is clearly discovery-only, while the two convert tools are separated by output behavior: _write persists .md files to disk and _read returns content as AI context. There is no meaningful overlap between any pair.

All tool names follow a consistent verb_noun pattern in lowercase snake_case, using the same 'diagrams' resource. The _read/_write suffixes are a coherent way to distinguish output modes, and list_diagrams fits the pattern as an independent discovery action.

Three tools is a well-scoped set for a focused converter utility: discover source files, convert to files, and convert to context. Each tool addresses a distinct workflow step without unnecessary expansion.

The core workflow of finding Draw.io diagrams and converting them to Mermaid Markdown is fully covered in both output modes (disk and context). No obvious dead ends or missing lifecycle operations are apparent for this narrow domain.