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Beta fields telling an agent what the current page offers: tab.url, page_capabilities and a short guidance note. To merge when the beta goes beyond internal organizations; set the changelog date then. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
tab.url and the capabilities describe the tab after the call, the MCP link pointed at a tool that never carries guidance, and the Python example was missing its json import. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
The page capabilities section says these tools show the note, so their reference pages need to say so too. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Availability now reads for when this merges, with the fields on for everyone. Covers when guidance is absent, that tools can show up a call later, that Kernel calls get_ucp_profile itself and that payment handlers are untrusted. The example now handles failed calls, and the MCP pages no longer imply page_capabilities is once per page. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
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What
Documents the beta page capabilities fields in Playwright and REPL responses:
tab.url,page_capabilitiesandguidance.browsers/webmcp.mdx.Why
KERNEL-2524 (kernel/kernel#5222). The note only helps if the model sees it, so the section tells customers to pass it along.
Merge order
Don't merge yet; this stays a draft. Merge once
webmcp_steeringisenabledfor everyone and the MCP coverage bot's PR for the SDK with these fields has shipped, since this says the MCP tools show the note. Orgs inobservedon't get these fields, and the copy assumes everyone has them. At merge:Testing
mintlify broken-linkspasses. Field names, the note's text and the 20-name cap were checked against kernel/kernel#5222.🤖 Generated with Claude Code