get_attachment_download

Access and behavior

A Read-only, Write or Administrator OAuth grant can call this tool within the user’s current team role. Tools are listed and callable only when the current grant and role permit them.

URLs expire after five minutes and are private capabilities. preview:true requests inline image/PDF display; otherwise the URL downloads the attachment.

Arguments

Argument	Required	Type or meaning
`taskId`	Yes	Task UUID, not its human identifier such as ENG-1.
`attachmentId`	Yes	uuid
`preview`	No	boolean

Complete input schema

{
  "type": "object",
  "properties": {
    "taskId": {
      "type": "string",
      "format": "uuid",
      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$"
    },
    "attachmentId": {
      "type": "string",
      "format": "uuid",
      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$"
    },
    "preview": {
      "type": "boolean"
    }
  },
  "required": ["taskId", "attachmentId"],
  "additionalProperties": false
}

Example call

The client initializes the MCP connection before sending this JSON-RPC call. Example records are fictional.

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_attachment_download",
    "arguments": {
      "taskId": "22222222-2222-4222-8222-222222222222",
      "attachmentId": "44444444-4444-4444-8444-444444444444",
      "preview": true
    }
  }
}

Example result

Mill returns this object in structuredContent and normally a JSON text content block (large responses may shorten the text block). A tool failure sets isError; never treat an error as a completed mutation.

{
  "url": "https://storage.example.test/private-download?signature=example",
  "expiresAt": "2027-01-18T09:30:00.000Z"
}

Connect a client

MCP reference

API Reference

get_attachment_download

Workflow

Access and behavior

Arguments

Example call

Example result

​Workflow

​Access and behavior

​Arguments

​Example call

​Example result

​Related reference

Workflow

Access and behavior

Arguments

Example call

Example result

Related reference