[FEATURE]: mcp server environment must accept env var.

Hello.

Simple request.

"mcp" {

      "environment": {
        "MY_API_KEY": "${MY_API_KEY}"
      },

}

"${MY_API_KEY}" should be accepted in setting for security..

This issue might be a duplicate of existing issues. Please check:

{env:...} variable substitution inconsistently fails for specific MCP server URLs #5299: {env:...} variable substitution inconsistently fails for specific MCP server URLs - This documents a related feature that partially exists but has bugs with environment variable substitution for MCP environments

Additionally, related feature requests on this topic:

feature: Ability to pass credentials without storing in environment file #318: Ability to pass credentials without storing in environment file - Requests environment variable and command substitution support
add ability to load secrets from external command or environment variables in the config file #231: Add ability to load secrets from external command or environment variables in the config file

Feel free to ignore if none of these address your specific case.

To stay organized issues are automatically closed after 90 days of no activity. If the issue is still relevant please open a new one.

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