[MODEL] Claude Code

Preflight Checklist

• [x] I have searched existing issues for similar behavior reports
• [x] This report does NOT contain sensitive information (API keys, passwords, etc.)

Type of Behavior Issue

Claude made incorrect assumptions about my project

What You Asked Claude to Do

I asked Claude to review an error in my N8N workflow.

What Claude Actually Did

Claude performed the task i ask but used mcp tools inefficiently and consumed excessive tokens (10,9K tokens)

Expected Behavior

Executed my instruction but with inefficient MCP tool usage consumed excessive tokens (10K tokens). The model decided to use the "full" mode, while when asked apologised and wrote that it could use a less token hungry mode (structure).

Files Affected

Permission Mode

Accept Edits was ON (auto-accepting changes)

Can You Reproduce This?

No, only happened once

Steps to Reproduce

1. Asked to correct an error in N8N workflow
2. Started checking
3. Got a notification "Large MCP response (~10.9k tokens), this can fill up context quickly"
4. Reported the issue
5. The error was not resolved

Claude Model

Opus

Relevant Conversation

Claude said: Let me check the current node configuration to see what's happening.                                                                                                     
                                                                                                                                                                           
⏺ n8n-mcp - Get Workflow (MCP)(id: "igPttgQ5BCfeFJK1", mode: "full")                                                                                                       
  ⎿  ⚠ Large MCP response (~10.9k tokens), this can fill up context quickly                                                                                                
  ⎿  {                                                                                                                                                                     
       "success": true,                                                                                                                                                    
       "data": {                                                                                                                                                           
     … +1336 lines (ctrl+o to expand)                                                                                                                                      
                                                                                                                                                                           
⏺ I can see the node configuration. Actually, it's already correctly configured:

Impact

High - Significant unwanted changes

Claude Code Version

2.1.14 (Claude Code)

Platform

Anthropic API

Additional Context

_No response_