Expected Behavior

#420 introduced McpTransportContext.

McpTransportContext should be supported in HttpServletSseServerTransportProvider to enable those who are still on that transport to leverage McpTransportContext to set attributes that Tools, etc. have access to. This is crucial for implementing Authentication & Authorization at the Tool level.

Current Behavior

McpTransportContext is absent from HttpServletSseServerTransportProvider

Context

How has this issue affected you?

We're not able to switch to HttpServletStreamableServerTransportProvider yet, but wish to use McpTransportContext instead of our custom built similar capability.

What are you trying to accomplish?

Authn/z at Tool level.

What other alternatives have you considered?

Continuing to use our internal fork similar implementation.

Are you aware of any workarounds?

No