Tool call arguments for read_file were invalid: Model provided invalid arguments for tool call

Support Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Tool call arguments for read_file were invalid: Model provided invalid arguments for tool call.

Steps to Reproduce

Load a background agent into chat history, checkout the branch. Send a new message to the agent (auto model): Tool call arguments for read_file were invalid: Model provided invalid arguments for tool call.
(Request ID: b8aea25b-9728-42d3-bc46-d9e8a720a5dd)

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Version: 1.5.11 (Universal)
VSCode Version: 1.99.3
Commit: 2f2737de9aa376933d975ae30290447c910fdf40
Date: 2025-09-05T03:48:32.332Z
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Darwin arm64 24.6.0

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

1 Like
2

Hey, which model are you using? Does this also happen in new chats? Could you share the request ID? First, you’ll need to disable privacy mode.

3

It only happens when I load chat from a background agent and then try to send a message in the same chat window.

Here’s a request with privacy disabled. Auto model.

Request ID: 1bbd1fb3-1d7e-4c18-b1da-6ea6fb882a25

4

+1. The model does not make a difference, mcp tools do not make a difference.. it happens just when I open a background agent created from slack that I opened up in cursor locally. Then I try to send a message and get the same error

5

I get exactly the same - when chatting/replying to what was originally a background agent, now in agent now.

6

Thanks everyone for the info, I’ve forwarded it to the team for investigation.

7

I have the same issue Request ID: 33161673-43ab-4a74-9a96-c8b19e379779
{“error”:“ERROR_BAD_REQUEST”,“details”:{“title”:“Tool call error”,“detail”:“Tool call arguments for read_file were invalid: Model provided invalid arguments for tool call.”,“additionalInfo”:{},“buttons”:,“planChoices”:},“isExpected”:true}
ConnectError: [invalid_argument] Error
at xyl.$endAiConnectTransportReportError (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:4910:338991)
at Qvr._doInvokeHandler (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:487:36019)
at Qvr._invokeHandler (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:487:35761)
at Qvr._receiveRequest (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:487:34526)
at Qvr._receiveOneMessage (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:487:33348)
at BCt.value (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:487:31442)
at ye._deliver (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:49:2962)
at ye.fire (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:49:3283)
at Wot.fire (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:4895:12154)
at MessagePort. (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:7028:18292)

8

Did anyone find a solution?

Tool call arguments for read_file were invalid: Unexpected parameters provided:

I have tried restarting, both computer and IDE - same error.
I tried changing the agent - same error.
I tried giving it a new prompt - same error.
I tried network diagnosis - all good. same error on prompt

This has completely stopped me from getting work done and I’m really hoping someone has a solution. It’s been 90 minutes of the same message over and over.

9

same here, just updated cursor and now I get this:
Tool call arguments for read_file were invalid: Unexpected parameters provided: should_read_entire_file, start_line_one_indexed, end_line_one_indexed. Expected parameters: { target_file: string (required), offset?: number, limit?: number }

(Request ID: a51964ac-0898-411f-9036-8d7217c2c283)

can’t use cursor anymore

10

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