> For the complete documentation index, see [llms.txt](https://docs.orbitfin.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.orbitfin.ai/orbit-api-reference/a2a/3.-tools-by-service.md).

# 3. Tools by Service

Each A2A service exposes its own set of Skills. The setup flow in Section 2 is identical for all of them, but the tools below are not interchangeable — check the service's own Agent Card for the authoritative list.