In an STDIO server is there any way to throw a tool error and/or a protocol error?

[AbhinavPalacharla]

From the MCP docs (https://modelcontextprotocol.io/specification/2025-06-18/server/tools#error-handling)

Protocol Error Example:

{
"jsonrpc": "2.0",
"id": 3,
"error": {
"code": -32602,
"message": "Unknown tool: invalid_tool_name"
}
}

Tool Error Example:
{
"jsonrpc": "2.0",
"id": 4,
"result": {
"content": [
{
"type": "text",
"text": "Failed to fetch weather data: API rate limit exceeded"
}
],
"isError": true
}
}