Captured output of the upstream `claude plugin validate` tool (Claude Code
2.1.224), run against a plugin.json whose "mcpServers" block contains a
single well-formed entry, for contrast with the empty-entry case in
claude_plugin_validate_empty_mcp_server.txt:

  {"mcpServers": {"server": {"command": "true", "args": []}}}

Command: claude plugin validate <plugin-dir>

Validating plugin manifest: <plugin-dir>/.claude-plugin/plugin.json

⚠ Found 1 warning:

  ❯ author: No author information provided. Consider adding author details for plugin attribution

✔ Validation passed with warnings
exit code: 0

The warning is about the unrelated "author" field; the tool does not
object to the mcpServers block itself when the entry is non-empty. The
temp directory path in the original run has been replaced with
<plugin-dir> above; nothing else was edited.
