GITHUB_PERSONAL_ACCESS_TOKEN env var name assumes a PAT will be used

[AArnott]

The GitHub MCP server must be spawned with GITHUB_PERSONAL_ACCESS_TOKEN as an environment variable set with a value to use in GitHub API calls. But the very name of this environment variable specifies too much. A personal access token is an access token that is provisioned manually by the user (through https://github.com/settings/tokens). This is tedious and a 'last resort' for authorizing apps.

A far preferable way to get an access token (which presumably works for this MCP server) is to use OAuth 2.0. For example, the Visual Studio keychain can produce such a token automatically for the user. But this is not a personal access token, but rather merely an access token.

The environment variable name suggests it must be a PAT, but in fact it's just an access token that's required.

Please consider adding support for GITHUB_ACCESS_TOKEN as an environment variable, document that, and deprecate use of the old environment variable name.

[github-actions[bot]]

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