G
Giulio Rugarli
Subject: Bug Report: Official MCP Server Schema Incompatibility with AntiGravity IDE (Gemini)
Hi ClickUp Team,
I'm writing to report a bug with your official MCP server that prevents it from functioning with AntiGravity IDE, which is listed as a supported MCP client in your documentation.
---
Issue Summary
When connecting to https://mcp.clickup.com/mcp via AntiGravity IDE, the connection fails immediately with HTTP 400 Bad Request due to an invalid tool schema.
Error received:
GenerateContentRequest.tools[26].function_declarations[0].parameters.properties[max_depth].enum: only allowed for STRING type
GenerateContentRequest.tools[26].function_declarations[0].parameters.properties[max_depth].enum[0]: cannot be empty
GenerateContentRequest.tools[26].function_declarations[0].parameters.properties[max_depth].enum[1]: cannot be empty
GenerateContentRequest.tools[26].function_declarations[0].parameters.properties[max_depth].enum[2]: cannot be empty
Root Cause
The
max_depth
parameter in one of your tool definitions (tools[26]) declares an
enum
on an INTEGER type field. The Gemini API — which powers AntiGravity IDE — only allows
enum
on STRING types. This is a schema incompatibility that causes a hard failure before any tool can be invoked.
Steps to Reproduce
  1. Open AntiGravity IDE
  2. Add the following MCP server config:
```json
{
"mcpServers": {
"clickup": {
"serverUrl": "https://mcp.clickup.com/mcp"
}
}
}
```
  1. Attempt to initialize the MCP connection
  2. Observe HTTP 400 error
Expected Behavior
The MCP server should load successfully and tools should be available in AntiGravity IDE, as per your documentation which explicitly lists AntiGravity as a supported client.
Suggested Fix
Convert the
max_depth
parameter (and any other integer enum fields) to STRING type with a runtime conversion on your server side, or remove the enum constraint and validate the value programmatically instead.
Environment
Since AntiGravity is listed as a supported client in your documentation (https://developer.clickup.com/docs/connect-an-ai-assistant-to-clickups-mcp-server), I'd appreciate a prompt resolution.
Thank you,