URL attachments for DIAL deployments

[ypldan]

QuickApps version

latest

What is the problem this feature will solve?

Let's say we have a public URL with PDF file (e.g. https://www.imf.org/-/media/files/publications/weo/2026/january/english/text.pdf).

The following use-cases should be supported:

1. Some app (e.g. DIAL RAG) supports URL attachments -> agent should be able to send this file as URL attachment to the app.
2. Some app does not support URL attachments, but supports in-DIAL attachments -> download this file to DIAL and send as regular attachment.
3. MCP server supports URL as argument -> agent should be able to send this URL to the MCP server.
4. MCP server supports in-DlAL attachments -> download this file to DIAL and send as regular attachment.
5. MCP server supports base64 attachments -> download file and encode to base64.

What is the feature you are proposing to solve the problem?

• extend the tool-call-file-parameter-formatting skill to support new use-cases
• extend tool args processing code to support new use-cases
• implement integration tests

What alternatives have you considered?

No response

[ypldan]

Implemented as part of #258