Failed to retrieve MCP settings; MCP functionality disabled

### Checks

- [x] 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 26.2.0 (25C56)

### Expected behaviour

Starting kiro-cli I get

WARNING: Failed to retrieve MCP settings; MCP functionality disabled

my file $HOME/.kiro/settings/mcp.json

`{"mcpServers":{"fetch":{"command":"uvx","args":["mcp-server-fetch"],"disabled":false}}}`

kiro-cli mcp list

```
⚠️ WARNING: Failed to retrieve MCP settings; MCP functionality disabled

🤖 default:

kiro_default
(empty)

📄 workspace:

kiro_planner
(empty)

```

Thanks
Matteo

### Actual behaviour

every timne I start kiro cli

### Steps to reproduce

_No response_

### Environment

```yaml

[q-details]
version = "1.23.1"
hash = "faddc2c7ee17078025a62a8dfad6543a4154d2fa"
date = "2025-12-23T20:47:25.898591Z (20d ago)"
variant = "full"

[system-info]
os = "macOS 26.2.0 (25C56)"
chip = "Apple M2 Pro"
total-cores = 12
memory = "16.00 GB"

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

[env-vars]
PATH = "/Users/USER/.opencode/bin:/Users/USER/.antigravity/antigravity/bin:/Users/USER/.local/bin:/Users/USER/.jbang/bin:/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:/opt/pmk/env/global/bin:/Library/Apple/usr/bin:/Library/TeX/texbin:/opt/podman/bin:/Users/USER/.local/bin:/opt/homebrew/bin:/Users/USER/.cargo/bin:/opt/homebrew/Cellar/libpq/17.6/bin:/Applications/ServiceNow CLI/bin:/opt/homebrew/opt/coreutils/libexec/gnubin"
QTERM_SESSION_ID = "36d2519c3c04484aaac48701728c2020"
Q_SET_PARENT_CHECK = "1"
Q_TERM = "1.23.1"
SHELL = "/bin/zsh"
TERM = "xterm-256color"
__CFBundleIdentifier = "com.github.wez.wezterm"
```

Start by reproducing the warning with the reported $HOME/.kiro/settings/mcp.json configuration, then run `q doctor`, `q restart`, and `kiro-cli mcp list`. Trace how the CLI retrieves MCP settings and determine what successful behavior should be for the provided server configuration; done means startup no longer disables MCP functionality and the server appears in the list.

索引モデルが issue の本文から書いたものです。