Bug: GitHub Server Tools (list_issues, update_issue, add_issue_comment, get_issue) Return Non-Compliant MCP Responses

[apappascs]

The list_issues, update_issue, add_issue_comment, and get_issue tools do not return responses in the correct MCP content structure, as defined in the MCP specification schema. This discrepancy results in incorrect or non-compliant tool responses, affecting integrations relying on these tools.

To Reproduce
Steps to reproduce the behavior:
Call the list_issues, update_issue, add_issue_comment, or get_issue tools.
Observe that the returned responses do not adhere to the MCP specification's schema.

Expected behavior
These tools should return responses formatted according to the MCP specification schema, ensuring consistency and compliance with the defined structure.

Additional context
This issue was addressed in PR #396, which refactors the affected tools to resolve this bug.