MCPB manifest uses invalid server type 'uv' - should be 'python'

[gpegoraro]

Description

The MCPB manifest at https://github.com/mims-harvard/ToolUniverse/releases/download/mcpb/tooluniverse.mcpb specifies an invalid server type, causing installation to fail.

Error Message

MCPB manifest invalid at https://github.com/mims-harvard/ToolUniverse/releases/download/mcpb/tooluniverse.mcpb: 
Invalid manifest: server: Invalid enum value. Expected 'python' | 'node' | 'binary', received 'uv'

Root Cause

The MCPB specification only allows three valid values for the server field:

• python
• node
• binary

The manifest currently specifies server: "uv", which is not a valid option in the MCPB schema.

Suggested Fix

Update the manifest to use server: "python" instead of server: "uv". The uv runtime can still be used internally for package management/execution, but the manifest should declare the server type as python to comply with the MCPB specification.

Environment

• Attempting to install via MCPB bundle
• Claude Code CLI

[gasvn]

Hi, we use uv because the calude desktop team recommand us to use it.
For claude code, we suggest you directly run this command to install the mcp server instead of using the mcpb

claude mcp add --transport stdio tooluniverse -- tooluniverse