Microsoft Foundry brings model choice, voice, and continuous optimization into one loop
Microsoft updates voice agents, long-running recovery, tool search, A2A, and production-trace optimization in Foundry.
Key takeaways
Microsoft announced a set of Foundry Agent Service updates on September 24. Voice agents entered public preview with support for more than 80 languages and 140 locales, and resilience for long-running hosted agents also entered public preview. Tool search in Toolboxes and Agent-to-Agent support are generally available, while Routines can start agents on a schedule, after a delay, or from an event. Foundry also links production traces, issue insights, evaluation data, and agent optimization into a continuous improvement loop. Microsoft's token-reduction figures come from an internal evaluation on a public benchmark, so teams still need their own tool catalog, accents, telephony paths, permissions, and regression tests.
Direct answer
Microsoft announced a set of Foundry Agent Service updates on September 24. Voice agents entered public preview with support for more than 80 languages and 140 locales, and resilience for long-running hosted agents also entered public preview. Tool search in Toolboxes and Agent-to-Agent support are generally available, while Routines can start agents on a schedule, after a delay, or from an event. Foundry also links production traces, issue insights, evaluation data, and agent optimization into a continuous improvement loop. Microsoft's token-reduction figures come from an internal evaluation on a public benchmark, so teams still need their own tool catalog, accents, telephony paths, permissions, and regression tests.
Verified facts
Microsoft announced public previews for Foundry voice agents and long-running hosted-agent resilience on September 24, 2026.
Voice agents support more than 80 languages and 140 locales, while tool search and A2A are generally available.
Routines can trigger agents by schedule, delay, or event, and production traces can feed insight, evaluation, and optimization workflows.
What changed
- Voice agents and long-running resilience enter public preview
- Tool search and A2A become generally available
- Routines provide native triggers
- Production traces feed evaluation and optimization
Impact for AI users
Platform teams should manage each capability by release status: keep previews in sandboxes or limited traffic, and still validate generally available features against local permissions and regressions. Voice tests need interruptions, noise, accents, transfers, recording notice, and human takeover. Long-running work needs disconnect, host-failure, and checkpoint drills. Optimization should run only on controlled datasets with rollback conditions.
Operating checklist
- Tier pilots by preview and general-availability status
- Test voice noise, interruption, and takeover
- Drill disconnect and recovery for long tasks
- Pin evaluation data and rollback conditions before optimization
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FAQ
Are all capabilities generally available?
No. Voice agents and long-running resilience are public previews, while tool search, A2A, and Routines have different release status.
Will every catalog reproduce the token reductions?
Not necessarily. Results depend on tools, queries, and the comparison baseline.
Summary
Foundry is combining agent runtime, voice, tools, and optimization, but production adoption still needs capability-by-capability acceptance based on status and risk.
This AI-assisted article is checked by ENHE AI automation for official sources, bilingual fields, media rights, page safety, and historical duplication before publication.
What this means for everyday users
Platform teams should manage each capability by release status: keep previews in sandboxes or limited traffic, and still validate generally available features against local permissions and regressions. Voice tests need interruptions, noise, accents, transfers, recording notice, and human takeover. Long-running work needs disconnect, host-failure, and checkpoint drills. Optimization should run only on controlled datasets with rollback conditions.
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