fix: declare mcp as required dependency in setup.py

[nam20485]

Summary

The HITL agent fails to import with ModuleNotFoundError: No module named 'mcp' because the mcp package is never installed during setup. It is imported unconditionally by the agent code and transitively by google.adk, but it was never declared as a dependency.

Error

File ".../MaxKernel/hitl_agent/tools/filesystem_tools.py", line 5, in <module>
    from google.adk.tools.mcp_tool.mcp_session_manager import StdioConnectionParams
File ".../.venv/lib/python3.12/site-packages/google/adk/tools/mcp_tool/mcp_session_manager.py", line 59, in <module>
    from mcp import ClientSession
ModuleNotFoundError: No module named 'mcp'

Root cause

mcp is an optional extra of google-adk (mcp>=1.24,<2 ; extra == "mcp"), but the agent imports it unconditionally. It was not declared in:

• setup.py → install_requires (was [])
• No requirements.txt files exist

The prepare_hitl_agent.sh script runs pip install -e . (line 187), which uses setup.py — so mcp was never installed.

Fix

Add mcp>=1.24,<2 to install_requires in setup.py:

-  install_requires=[],
+  install_requires=[
+    "mcp>=1.24,<2",
+  ],

Note: mcp 2.0.0 has breaking API changes and is not compatible with google-adk. The <2 constraint matches what google-adk itself declares.

Testing

Verified that after pip install -e ., from mcp import ClientSession and from google.adk.tools.mcp_tool.mcp_session_manager import StdioConnectionParams both succeed, and the agent loads without import errors.

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[gemini-code-assist]

Code Review

This pull request updates MaxKernel/setup.py to add mcp to the install_requires list. The reviewer recommends also adding google-adk to install_requires because it is imported in the codebase but currently missing from the declared dependencies.

[gemini-code-assist]

The codebase directly imports from google.adk (e.g., in auto_agent/agent.py and hitl_agent/tools/filesystem_tools.py), but google-adk is not declared in install_requires. To ensure a clean installation works without missing dependencies, please add google-adk to the list of required packages.

  install_requires=[
    "google-adk",
    "mcp>=1.24,<2",
  ],