Every tool the GitHub MCP server offered was sitting right there in the list — all 26 were recognized correctly. Call any one of them and it failed in under 1 second, every time, with one line on screen: Tool execution failed . No reason attached.
Source: [Dev.to](https://dev.to/nomurasan/all-26-of-my-mcp-tools-failed-the-same-way-my-test-to-rule-out-the-token-proved-it-was-the-problem-4ol5)