---
id: EDGE-7
family: GR-EDGE
level: extended
profiles: [storage-api, runtime]
posture: normative-target
added: "1.0"
changed: "1.0"
source: https://flowdrop.io/spec/rules/gr-edge/edge-7
specification: FlowDrop Workflow Specification 1.0-draft
licence: CC BY 4.0
---

# EDGE-7 — A tool-only node is excluded from the execution graph

*GR-EDGE (Part I) · level: extended · profiles: storage-api, runtime · added in 1.0*

## The rule

> **Normative.** This is the rule.
>
> 1. A node is tool-only when it has at least one outgoing edge and every one of its outgoing edges is a tool edge.
>
> 2. A node with no outgoing edges is not tool-only, and neither is one with any non-tool outgoing edge.
>
> 3. A tool-only node is excluded from the compiled execution graph, with `tool_only` as the recorded reason, and generates no job; it runs inline only, when a consumer invokes it as a tool.

## Related rules

- Names: EDGE-5
- Referenced by: EDGE-5

---

Rule identifiers are permanent and are never renumbered. This specification carries
no implementation status: each implementation publishes its own standing against
these rules. Licensed CC BY 4.0.