Tool update_memory not found

Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

When asking the agent to memorize something and it tries to do so, in the agent chat view the line “Tool update_memory not found.” appears. It was working three days ago before the last update.

Steps to Reproduce

Ask the agent to memorize something (e.g. “Please memorize to check if you run on Windows or Linux before calling OS-specific tools.”

Expected Behavior

A small popup shall open up asking me to “accept” or “decline” the new “memory”.

Operating System

Linux

Current Cursor Version (Menu → About Cursor → Copy)

Version: 1.5.9
VSCode Version: 1.99.3
Commit: de327274300c6f38ec9f4240d11e82c3b0660b20
Date: 2025-08-30T21:02:27.236Z
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Linux x64 6.14.0-29-generic

Additional Information

This is really frustrating, because cursor sometimes falls into “deduction error spirals” where it assumes something wrong and tries to make the code fit its expectations when you as the user can clearly see what is going on and a simple “memory” could shortcut such behavior.

Does this stop you from using Cursor

No - Cursor works, but with this issue

1 Like
2

Hey, thanks for the report. Could you let me know if this happens in a new chat? Also, could you let me know which model you are using?

3

Hi!

The problem persists even when i open a new chat. The model setting is in “Auto” mode, but when I disable it, it appears to have “claude-4-sonnet” selected for default. Does that help? Or how can I check which agent the “auto” setting calls? Thank you!

4

Thanks for the additional info, we’ll check it.