Python: fix parsing of types in mcp server (#12871)

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The parsing of tool call output was not working correctly, this fixes
that.
Solves #12850 

### Description

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### Contribution Checklist

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- [x] The code builds clean without any errors or warnings
- [x] The PR follows the [SK Contribution
Guidelines](https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md)
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raises no violations
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Author: eavanvalkenburg

python/semantic_kernel/connectors/mcp.py

@@ -949,21 +949,23 @@ async def _call_tool(
                 ] = []
                 if isinstance(value, list):
                     for item in value:
-                        if isinstance(
-                            value, (TextContent, ImageContent, BinaryContent, AudioContent, ChatMessageContent)
-                        ):
-                            messages.extend(_kernel_content_to_mcp_content_types(item))
-                        else:
+                        match item:
+                            case (
+                                TextContent() | ImageContent() | BinaryContent() | AudioContent() | ChatMessageContent()
+                            ):
+                                messages.extend(_kernel_content_to_mcp_content_types(item))
+                            case _:
+                                messages.append(
+                                    types.TextContent(type="text", text=str(item)),
+                                )
+                else:
+                    match value:
+                        case TextContent() | ImageContent() | BinaryContent() | AudioContent() | ChatMessageContent():
+                            messages.extend(_kernel_content_to_mcp_content_types(value))
+                        case _:
                             messages.append(
-                                types.TextContent(type="text", text=str(item)),
+                                types.TextContent(type="text", text=str(value)),
                             )
-                else:
-                    if isinstance(value, (TextContent, ImageContent, BinaryContent, AudioContent, ChatMessageContent)):
-                        messages.extend(_kernel_content_to_mcp_content_types(value))
-                    else:
-                        messages.append(
-                            types.TextContent(type="text", text=str(value)),
-                        )
                 return messages
             raise McpError(
                 error=types.ErrorData(