docs: update client concept guides for the 2026-07-28 protocol changes#3067
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- describe the form and URL elicitation modes and reframe the privacy guidance around URL mode - rewrite the elicitation and sampling flows for Multi Round-Trip Requests (InputRequiredResult / inputRequests) - mention tool calling in sampling and retarget the /docs/concepts/sampling redirect to the latest spec - drop roots/list_changed and logging/setLevel references and document the per-request io.modelcontextprotocol/logLevel _meta field - add deprecation callouts for Roots, Sampling, and Logging with suggested migrations Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016WBaED7Rta4YsYVz66Qoru
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Requested by Den Delimarsky · Slack thread
Readers of the draft client concept guides previously saw elicitation and sampling described as direct server-to-client requests, with no mention of URL mode elicitation or of tools in sampling. These pages now walk through the tool-call retry flow for those interactions and cover the new URL elicitation mode and tool-capable sampling. The deprecated client features now carry warning callouts with suggested migrations.
Motivation and Context
This is part of preparing the client documentation for the 2026-07-28 protocol release. The draft guides still described server-initiated request flows that the spec has since replaced with the MRTR tool-call retry pattern, and they referenced removed features such as
logging/setLevelruntime adjustment and theroots/list_changednotification. New behavior like URL mode elicitation and tool-capable sampling was missing entirely, as were the deprecation notices from the draft changelog.Closes #3029
Closes #3030
Closes #3032
Closes #3033
Closes #3042
How Has This Been Tested?
Documentation-only change.
npm run check:docspasses in full on this branch, covering the prettier format check, the MDX comment check, and the mint broken-links check.docs/docs.jsonfailsprettier --checkon the base already, so the edit there was limited to the single redirect line instead of reformatting the whole file.Breaking Changes
None.
Types of changes
Checklist
Additional context
Other rc-high-priority bundle PRs also touch
docs/docs/draft/learn/architecture.mdx,docs/docs/draft/tools/debugging.mdx, anddocs/docs.json, so merge order between those PRs may need care.AI assistance disclosure: the documentation edits and this PR description were drafted by an AI coding agent working from the bundled issues and the draft specification, and the full diff receives human review before merge.
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