Observe MCP Server

# Field Not Found Error Patterns ## Check Dataset Schema First ```opal # Use this to explore available fields sort desc(timestamp) | limit 5 ``` ## Common Log Fields ```opal # Try these common log field patterns: make_col log_level: string(LogAttributes.level) make_col container: string(resource_attributes."k8s.container.name") make_col namespace: string(resource_attributes."k8s.namespace.name") make_col pod: string(resource_attributes."k8s.pod.name") ``` ## Common Metric Dimensions ```opal # Metrics typically use labels for dimensions: filter metric = "cpu_usage" | statsby avg_cpu: avg(value), group_by(string(labels.instance)) ``` ## Nested Field Access ```opal # For deeply nested fields, use dot notation with quotes: make_col service: string(attributes."service.name") make_col version: string(attributes."service.version") ```