test: add debug output and model to MCP e2e tests (#536)

## Summary
- Add print statements to MCP e2e tests for debug visibility of message
types and content
- Specify `model="claude-opus-4-5"` in the permission enforcement test
- Print the `executions` dict in the permission test for easier
debugging

## Test plan
- [ ] Run `python -m pytest e2e-tests/test_sdk_mcp_tools.py -v -s` to
verify debug output appears
- [ ] Confirm permission enforcement test passes with specified model

## Changelog
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<!-- CHANGELOG:END -->

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

Author: ashwin-ant

e2e-tests/test_sdk_mcp_tools.py

@@ -43,7 +43,7 @@ async def echo_tool(args: dict[str, Any]) -> dict[str, Any]:
         await client.query("Call the mcp__test__echo tool with any text")
 
         async for message in client.receive_response():
-            pass  # Just consume messages
+            print(f"  [{type(message).__name__}] {message}")
 
     # Check if the actual Python function was called
     assert "echo" in executions, "Echo tool function was not executed"
@@ -74,6 +74,7 @@ async def greet_tool(args: dict[str, Any]) -> dict[str, Any]:
     )
 
     options = ClaudeAgentOptions(
+        model="claude-opus-4-5",
         mcp_servers={"test": server},
         disallowed_tools=["mcp__test__echo"],  # Block echo tool
         allowed_tools=["mcp__test__greet"],  # But allow greet
@@ -85,9 +86,10 @@ async def greet_tool(args: dict[str, Any]) -> dict[str, Any]:
         )
 
         async for message in client.receive_response():
-            pass  # Just consume messages
+            print(f"  [{type(message).__name__}] {message}")
 
     # Check actual function executions
+    print(f"  Executions: {executions}")
     assert "echo" not in executions, "Disallowed echo tool was executed"
     assert "greet" in executions, "Allowed greet tool was not executed"
 
@@ -127,7 +129,7 @@ async def greet_tool(args: dict[str, Any]) -> dict[str, Any]:
         )
 
         async for message in client.receive_response():
-            pass  # Just consume messages
+            print(f"  [{type(message).__name__}] {message}")
 
     # Both tools should have been executed
     assert "echo" in executions, "Echo tool was not executed"
@@ -161,6 +163,6 @@ async def echo_tool(args: dict[str, Any]) -> dict[str, Any]:
         await client.query("Call the mcp__noperm__echo tool")
 
         async for message in client.receive_response():
-            pass  # Just consume messages
+            print(f"  [{type(message).__name__}] {message}")
 
     assert "echo" not in executions, "SDK MCP tool was executed"