[BUG] Display breaks due to aligned parameter rendering for MCP tools

Resolved 💬 3 comments Opened Jul 28, 2025 by lava Closed Aug 15, 2025

Environment

  • Platform (select one):
  • [x] Anthropic API
  • [ ] AWS Bedrock
  • [ ] Google Vertex AI
  • [ ] Other: <!-- specify -->
  • Claude CLI version: 1.0.61
  • Operating System: Ubuntu 24.04
  • Terminal: bash

Bug Description

When displaying MCP tool calls, the CLI tries to align the call parameters with the opening ( character. This breaks hilariously when the tool name is very long compared to the terminal width. For example, I get the following output when running the terraform MCP commands in a 92-character wide terminal window:

╭─────────────────────────────────────────────────────────────╮
│ ✻ Welcome to Claude Code!                                   │
│                                                             │
│   /help for help, /status for your current setup            │
│                                                             │
│   cwd: [censored]  │
╰─────────────────────────────────────────────────────────────╯

> /mcp 
  ⎿  (no content)

> Look up the required parameters for the aws_glue_crawler terraform resource, and 
  check that the one in athena.tf is valid according to the docs

● I'll help you look up the required parameters for the aws_glue_crawler Terraform
  resource and validate the one in athena.tf. Let me start by checking the current
  configuration and then consulting the documentation.

● Update Todos
  ⎿  ☐ Read the current aws_glue_crawler configuration in athena.tf               
     ☐ Look up aws_glue_crawler required parameters in Terraform AWS provider docs
     ☐ Validate the configuration against the documentation requirements

● Update Todos
  ⎿  ☐ Read the current aws_glue_crawler configuration in athena.tf               
     ☐ Look up aws_glue_crawler required parameters in Terraform AWS provider docs
     ☐ Validate the configuration against the documentation requirements

● Read(athena.tf)
  ⎿  Read 471 lines (ctrl+r to expand)

● Update Todos
  ⎿  ☒ Read the current aws_glue_crawler configuration in athena.tf               
     ☐ Look up aws_glue_crawler required parameters in Terraform AWS provider docs
     ☐ Validate the configuration against the documentation requirements

● terraform - Identify the most relevant provider document ID for a Terraform service (MCP)
                                                                                       (
                                                                                       p
                                                                                       r
                                                                                       o
                                                                                       v
                                                                                       i
                                                                                       d
                                                                                       e
                                                                                       r
                                                                                       N
                                                                                       a
                                                                                       m
                                                                                       e
                                                                                       :

                                                                                       "
                                                                                       a
                                                                                       w
                                                                                       s
                                                                                       "
                                                                                       ,

                                                                                       p
                                                                                       r
                                                                                       o
                                                                                       v
                                                                                       i
                                                                                       d
                                                                                       e
                                                                                       r
                                                                                       N
                                                                                       a
                                                                                       m
                                                                                       e
                                                                                       s
                                                                                       p
                                                                                       a
                                                                                       c
                                                                                       e
                                                                                       :

                                                                                       "
                                                                                       h
                                                                                       a
                                                                                       s
                                                                                       h
                                                                                       i
                                                                                       c
                                                                                       o
                                                                                       r
                                                                                       p
                                                                                       "
                                                                                       ,

                                                                                       s
                                                                                       e
                                                                                       r
                                                                                       v
                                                                                       i
                                                                                       c
                                                                                       e
                                                                                       S
                                                                                       l
                                                                                       u
                                                                                       g
                                                                                       :

                                                                                       "
                                                                                       g
                                                                                       l
                                                                                       u
                                                                                       e
                                                                                       _
                                                                                       c
                                                                                       r
                                                                                       a
                                                                                       w
                                                                                       l
                                                                                       e
                                                                                       r
                                                                                       "
                                                                                       ,

                                                                                       p
                                                                                       r
                                                                                       o
                                                                                       v
                                                                                       i
                                                                                       d
                                                                                       e
                                                                                       r
                                                                                       D
                                                                                       a
                                                                                       t
                                                                                       a
                                                                                       T
                                                                                       y
                                                                                       p
                                                                                       e
                                                                                       :

                                                                                       "
                                                                                       r
                                                                                       e
                                                                                       s
                                                                                       o
                                                                                       u
                                                                                       r
                                                                                       c
                                                                                       e
                                                                                       s
                                                                                       "
                                                                                       ,

                                                                                       p
                                                                                       r
                                                                                       o
                                                                                       v
                                                                                       i
                                                                                       d
                                                                                       e
                                                                                       r
                                                                                       V
                                                                                       e
                                                                                       r
                                                                                       s
                                                                                       i
                                                                                       o
                                                                                       n
                                                                                       :

                                                                                       "
                                                                                       l
                                                                                       a
                                                                                       t
                                                                                       e
                                                                                       s
                                                                                       t
                                                                                       "
                                                                                       )
  ⎿ Available Documentation (top matches) for resources in Terraform provider hashicorp
    /aws version: 6.5.0
    … +13 lines (ctrl+r to expand)


● terraform - Fetch detailed Terraform provider documentation using a document ID (MCP)
                                                                                       (
                                                                                       p
                                                                                       r
                                                                                       o
                                                                                       v
                                                                                       i
                                                                                       d
                                                                                       e
                                                                                       r
                                                                                       D
                                                                                       o
                                                                                       c
                                                                                       I
                                                                                       D
                                                                                       :

                                                                                       "
                                                                                       9
                                                                                       5
                                                                                       0
                                                                                       3
                                                                                       8
                                                                                       1
                                                                                       0
                                                                                       "
                                                                                       )
  ⎿  ---                            
     subcategory: "Glue"
     layout: "aws"
     … +336 lines (ctrl+r to expand)

● Update Todos
  ⎿  ☒ Read the current aws_glue_crawler configuration in athena.tf               
     ☒ Look up aws_glue_crawler required parameters in Terraform AWS provider docs
     ☐ Validate the configuration against the documentation requirements

View original on GitHub ↗

This issue has 3 comments on GitHub. Read the full discussion on GitHub ↗