René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"`get_tag` tool won't work on private repositories even if the sufficient permissions are granted","articleBody":"### Describe the bug\n\n`get_tag` tool won't work for private repositories, both with providing tag name and SHA of it. Tried this with both fine grained PAT tokens  and also installation token generated from a GitHub app with correct permissions (Contents read - see [here](https://docs.github.com/en/rest/git/tags?apiVersion=2026-03-10#get-a-tag)). \n\n### Affected version\n\nI am currently using remote MCP server, using the endpoint `https://api.githubcopilot.com/mcp/x/all/` with header: `X-MCP-Toolsets: actions,context,repos,issues,pull_requests,users`.\n\n### Steps to reproduce the behavior\n\n1. Create a fine-grained PAT token which can access a private repository and uses `Contents` read permission.\n2. Using MCP inspector, connect to remote GitHub MCP server (be sure that `Authorization` -using Bearer ... format- and `X-MCP-Toolsets` headers are populated correctly)\n3. Click 'List tools' to get tool list\n4. Select `get_tag` tool\n5. Fill the arguments\n6. Observe 404 Not Found\n\nI also tested this with GitHub Rest API and that is also not working, so it might be a problem related with Rest API (and it affected GitHub MCP server since requests are forwarded to that endpoint by a conversion layer).\n\n### Expected vs actual behavior\n\nIt should return 200 response with details seen [here](https://docs.github.com/en/rest/git/tags?apiVersion=2026-03-10#get-a-tag).","author":{"url":"https://github.com/orhanasan","@type":"Person","name":"orhanasan"},"datePublished":"2026-04-06T11:46:58.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/2297/github-mcp-server/issues/2297"}