Function mark_semantic_tool_error

src/mcp/server.rs:554–561

(value: &mut Value)

}

fn mark_semantic_tool_error(value: &mut Value) {
    if !tool_result_has_semantic_error(value) {
        return;
    }
    if let Some(obj) = value.as_object_mut() {
        obj.insert("isError".to_string(), json!(true));
    }
}

/// Map response-handle failures onto actionable JSON-RPC errors at the MCP
/// boundary so clients can distinguish bad input from cache/runtime problems.