What the reviewer found
PostToolUse on every tool runs eng/common/scripts/azsdk_tool_telemetry.ps1, which on skill invocations launches the locally installed azsdk CLI with ingest-telemetry, sending client type, session id and skill name to Microsoft's Azure SDK telemetry, with no file contents or environment. The AZSDKTOOLS_COLLECT_TELEMETRY=false opt-out is ineffective because the script calls Write-Success before that function is defined and SilentlyContinue swallows the error, so execution falls through and still reports.
telemetry— reports to a vendor
What was read
The hook definition and the script it runs, fetched from Azure/azure-sdk-for-net:
.github/hooks/hooks.jsoneng/common/scripts/azsdk_tool_telemetry.ps1
What the static scan said
The 26-rule scan found nothing in this file; the review read it anyway.
How this review was made
Fable 5.1 read the files above on 7 September 2026 and answered three questions: is it dangerous to whoever installs it, is each scanner finding real, and what should the installer know. The verdict is bound to the file's hash; when the file changes, it is scanned afresh and reviewed again. A script that changes while the definition does not is not re-reviewed — that is a known gap. How the scan and the review work.