Support dynamic headers/authorization for McpToolset #32
Description
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Contribution guide.
✅
Is your feature request related to a problem? Please describe.
The McpToolset, specifically StreamableHTTPConnectionParams, needs to support dynamic headers and/or authorization params to be sent to the MCP server. A static hardcoded header param exists now on StreamableHTTPConnectionParams of type Record<string, unknown> | undefined but that isn't enough to be able to send generated and refreshed tokens and other dynamic information.
Describe the solution you'd like
The McpToolset should support a function arg to header or ideally more comprehensive authentication support in the way that the Python ADK does.
Describe alternatives you've considered
There is no alternative that I found; this must be added.
Additional context
N/A