Amazon Q is having trouble responding right now:

### Checks

- [ ] I have searched [github.com/aws/amazon-q-developer-cli/issues](https://github.com/aws/amazon-q-developer-cli/issues?q=) and there are no duplicates of my issue
- [x] I have run `q doctor` in the affected terminal session
- [x] I have run `q restart` and replicated the issue again

### Operating system

macOS 14.7.0 (23H124)

### Expected behaviour

The tool should work normally when I use q chat. For example when I prompt for tools it should list the tools, If I prompt to go through a directory and analyse it should be able to understand the content.

### Actual behaviour

Amazon Q is having trouble responding right now:
0: Failed to send the request: unhandled error (ValidationException)
1: unhandled error (ValidationException)
2: service error
3: unhandled error (ValidationException)
4: Error { code: "ValidationException", message: "Improperly formed request.", aws_request_id: "38382482-3bc0-4d50-9b11-003abae15ad4" }

Location:
crates/chat-cli/src/cli/chat/mod.rs:997

Backtrace omitted. Run with RUST_BACKTRACE=1 environment variable to display it.
Run with RUST_BACKTRACE=full to include source snippets.

### Steps to reproduce

I start the q chat and it starts throwing that error

### Environment

```yaml

[q-details]
version = "1.13.2"
hash = "e44ee53d76813a5ef107dcd0d6181b089cb5b2f2"
date = "2025-08-08T20:32:47.811878Z (18h ago)"
variant = "full"

[system-info]
os = "macOS 14.7.0 (23H124)"
chip = "Apple M1 Pro"
total-cores = 8
memory = "32.00 GB"

[environment]
cwd = "/Users/USER/"
cli-path = "/Users/USER/"
os = "Mac"
shell-path = "/bin/zsh"
shell-version = "5.9"
terminal = "macOS"
install-method = "unknown"

[env-vars]
PATH = "/Users/USER/.local/bin:/opt/homebrew/opt/openjdk@21/bin:/Users/USER/.pyenv/plugins/pyenv-virtualenv/shims:/Users/USER/.pyenv/shims:/Users/USER/.pyenv/bin:/opt/homebrew/opt/mysql-client@5.7/bin:/opt/homebrew/opt/mysql-client@8.0/bin:/Users/USER/.pyenv/plugins/pyenv-virtualenv/shims:/Users/USER/.pyenv/bin:/Users/USER/.docker/bin:/Users/USER/.local/bin:/opt/homebrew/bin:/opt/homebrew/sbin:/usr/local/bin:/System/Cryptexes/App/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/local/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/appleinternal/bin:/Library/Apple/usr/bin:/usr/local/munki:/Users/USER/.local/bin:/Users/USER/.orbstack/bin:/Users/USER/go/bin"
QTERM_SESSION_ID = "58d18ced764b42c680016c53814cdf04"
Q_SET_PARENT_CHECK = "1"
Q_TERM = "1.13.2"
SHELL = "/bin/zsh"
TERM = "xterm-256color"
__CFBundleIdentifier = "com.apple.Terminal"
```