Lord1Egypt Send a message the user will read. Text outside this tool is visible in the detail view, but most won't open it — the answer lives here.
message supports markdown. attachments accepts two forms per entry: a file path string (absolute or cwd-relative) for a file you can read here — images, diffs, logs — or the exact {file_uuid, file_name, size, is_image} object a device tool like attach_file returned to you. Use the path form when the file is on your working filesystem; use the object form when the user's device already uploaded the file and handed you a reference — pass that object through verbatim, don't try to path it.
status labels intent: 'normal' when replying to what they just asked; 'proactive' when you're initiating — a scheduled task finished, a blocker surfaced during background work, you need input on something they haven't asked about. Set it honestly; downstream routing uses it.