Describe the bug

Running get_file_contents in the latest main docker 3e32f75 returns nil.

Affected version

GitHub MCP Server
Version: main
Commit: 3e32f75cf4d7fd6f226b0680d9737b33ca536775
Build Date: 2025-06-12T12:55:13Z

Steps to reproduce the behavior

1. Type this to the LLM to run the MCP 'Use the GitHub MCP tools to read the README.md file in the evalstate/fast-agent repository'
2. View the output
3. See {{<nil>} } be returned

Expected vs actual behavior

A clear and concise description of what you expected to happen and what actually happened.

Expected:

Actual: