Unexplainable MCP errors in cursor-agent

[sam.saffron]

Where does the bug appear (feature/product)?

Cursor CLI

Describe the Bug

mcp list results in unconditional errors.

% cursor-agent mcp list
playwright: error: 

 % cursor-agent mcp list-tools playwright
Tools for playwright (24):
- browser_click (element, ref, doubleClick, button)
- browser_close ()
- browser_console_messages ()
- browser_drag (startElement, startRef, endElement, endRef)
- browser_evaluate (function, element, ref)
- browser_file_upload (paths)

Steps to Reproduce

cat .cursor/mcp.json 
{
  "mcpServers": {
    "playwright": {
      "command": "npx",
      "args": [
        "-y",
        "@playwright/mcp@latest"
      ]
    }
  }
}

Expected Behavior

No unexplainable error. --verbose to get even more details if anything is omitted

Operating System

Linux

Current Cursor Version (Menu → About Cursor → Copy)

cursor-agent --version
2025.08.15-dbc8d73

Does this stop you from using Cursor

No - Cursor works, but with this issue

---

Same mcp works fine with no errors in playground/codex/claude.

[deanrie]

Hey, thanks for the report. We’ll look into it.