Support Stream tool result?

[He-Pin]

Pre-submission Checklist

• I have verified this would not be more appropriate as a feature request in a specific repository
• I have searched existing discussions to avoid duplicates

Your Idea

With the current design, a single invocation to tool need to return the content list as a whole, it would be nice to have that support streaming.

eg:
instead of:

{
  "jsonrpc": "2.0",
  "id": 4,
  "result": {
    "content": [
      {
        "type": "text",
        "text": "Failed to fetch weather data: API rate limit exceeded"
      }
    ],
    "isError": true
  }
}

It would be nice :

{
  "jsonrpc": "2.0",
  "id": 4,
  "result": {
    "content": [
      {
        "type": "text",
        "text": "this is the first content"
      }
    ],
    "hasMore": true,
    "isError": false
  }
}

{
  "jsonrpc": "2.0",
  "id": 4,
  "result": {
    "content": [
      {
        "type": "text",
        "text": "Failed to fetch weather data: API rate limit exceeded"
      }
    ],
    "hasMore": false,,
    "isError": true
  }
}

Scope

• Protocol Specification
• SDK Features
• Documentation
• Developer Experience
• Other

[itsaphel]

I suppose this would enable a downstream client to process the data in logical chunks. But what would be a realistic use case?

[He-Pin]

There are models which is streaming responses.