Can HTTP streamable support tool execution process return StreamingResponse , similar to large model dialogue? #930

Is your feature request related to a problem? Please describe.
When the mcp tool execution process is long, in order to avoid users waiting too long, intermediate results can be returned to the user first.

Describe the solution you'd like
I tried to define the return of the method using @mcp. tool() as StreamingResponse. When the client call this mcp tool, only str can be obtained instead of the StreamingResponse object.