René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"blocked bug from using MCP server in Antigravity IDE","articleBody":"\n\u003cimg width=\"526\" height=\"724\" alt=\"Image\" src=\"https://github.com/user-attachments/assets/353784ca-dfb3-4825-8637-a03789ab1a6e\" /\u003e\n\n***\n\n### Describe the bug\n\nWhen using the `github-mcp-server` with an LLM client or gateway that integrates with the Gemini API (such as Antigravity), tool initialization/registration fails with a `400 INVALID_ARGUMENT` error. \n\nThis is caused by an invalid JSON Schema definition for the `delete` parameter within the `issue_fields` array property of the `issue_write` tool. The schema defines `delete` with `Enum: []any{true}`. Because the Gemini API's protobuf representation only supports string enums (`repeated string enum`), non-string values like the boolean `true` are serialized into an empty string (`\"\"`), which fails the API gateway validation.\n\n### Affected version\n\n```\nGitHub MCP Server\nVersion: v1.5.0\nCommit: 8cd03c018525ae0bafc9b3cdb84ec2133e01bac2\nBuild Date: 2026-06-27T07:57:40Z\n```\n\n### Steps to reproduce the behavior\n\n1. Start `github-mcp-server` in stdio mode.\n2. Launch a client that bridges the MCP server's JSON schema tool declarations to the Gemini API (such as Antigravity).\n3. Attempt to register the `issue_write` tool schema with the Gemini API.\n4. The Gemini API rejects the request, returning a `400 INVALID_ARGUMENT` response indicating `enum[0]` is empty.\n\n### Expected vs actual behavior\n\n* **Expected:** The `issue_write` tool schema registers successfully.\n* **Actual:** Registration fails with `INVALID_ARGUMENT: enum[0]: cannot be empty` because of the boolean enum constraint on the `delete` parameter. Removing `Enum: []any{true}` (making it a clean boolean type parameter, which matches the schema used in the granular `set_issue_fields` tool) resolves the error.\n\n### Logs\n\n```json\n{\n  \"error\": {\n    \"code\": 400,\n    \"message\": \"* GenerateContentRequest.tools[51].function_declarations[0].parameters.properties[issue_fields].items.properties[delete].enum[0]: cannot be empty\\n\",\n    \"status\": \"INVALID_ARGUMENT\"\n  }\n}\n```\n\n### Fix\nkindly, check the following pull request \nfix: remove invalid boolean enum from issue_write delete parameter this appears in antigravity IDE cause error\n[https://github.com/github/github-mcp-server/pull/2887](https://github.com/github/github-mcp-server/pull/2887)","author":{"url":"https://github.com/Mazen-Embaby","@type":"Person","name":"Mazen-Embaby"},"datePublished":"2026-07-18T10:46:53.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/2904/github-mcp-server/issues/2904"}