[Feature Request]: Allow multiple StreamableHTTP content

[IgnasiBosch]

Some MCP tools return multiple result.content. It's actually a list for that purpose.
For some reason, StreamableHTTP transport explicitly returns [types.TextContent(type=result.content[0].type, text=result.content[0].text)]. Meaning, only the first item is returned. [source]

What about returning [types.TextContent(type=content.type, text=content.text) for content in result.content] instead?

I'm not sure whether this behavior is intended. But it's a relatively short one.

Created PR: #1189

🧭 Type of Feature

Please select the most appropriate category:

• Enhancement to existing functionality
• New feature or capability
• New MCP-compliant server
• New component or integration
• Developer tooling or test improvement
• Packaging, automation and deployment (ex: pypi, docker, quay.io, kubernetes, terraform)
• Other (please describe below)

🧭 Epic

Title: StreamableHTTP multiple content
Goal: Be compliant with some MCP servers
Why now: Some responses from MCP servers are being truncated

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[crivetimihai]

Closed by #1189