[ex3ndr]

Change

Show the built-in tools' short display summaries in native Happy Agent / Cloud activity rows. Descriptions take priority over the explicitly mapped explanation/title/name and tool-specific display fields. Whitespace is collapsed and labels are capped at 120 Unicode scalars, matching the server contract. Blank or missing fields keep useful older-history fallbacks; arbitrary semantic names/titles are not promoted.

• Preserve bounded display fields when decoding rich tool presentations, without retaining raw code or patch payloads.
• Keep rich detail bodies, diff counts, glyphs, failure/running state, media and navigation intact.
• Fetch full details for compact generic calls whose result was omitted.
• Keep plan progress alongside its explanation and keep MCP server/tool identity (including the full tool-name remainder). MCP descriptions remain semantic input.
• Remove the empty verb's layout gap when a summary stands alone.

This affects the Happy Agent / Cloud path, not the separate legacy Bash renderer.

Verification

• Regression tests first failed on the old implementation: six UIKit cases (68 assertions), two core cases and one layout case.
• Final native verification on Kirill Mac: 58 core/layout tests passed; 491 UIKit tests, zero failures, one existing skip.
• Tests cover all 50 display-description tools, explicit field fallbacks, blank/non-string values, Unicode normalization, decoded rich commands, unchanged rich bodies, diff counts, MCP identity, plan progress, compact-detail fetching and exact row geometry.
• Evidence: /Users/kirilldubovitskiy/ctb-out/tool-labels.XzuvaD/.
• Independent exact-commit source and contract review: PASS, no findings.

Live iPhone 12 production verification is explicitly a follow-up after the server description and compact-history changes are deployed: use existing qa-batch-76eca2, exercise Python, and exercise shell only if compute is already attached. No new server, provider changes, compute attachment or Preview upload. No live proof is claimed yet.

[ex3ndr]

Reviewed head 760664fb7fb00160f0f2b09b797494a8e9a16197 meets the explicitly approved fixture-test merge gate:

• Required UIKit CI job 128929975216 passed 491 tests, zero failures, one existing skip. All seven new ToolWords cases passed.
• Local native verification passed 58 core/layout tests (including the exact 50-tool display-field contract) and the same full UIKit suite.
• Independent exact-commit source/contract review passed with no findings.

The three reporting-only hosted shards are still running at merge time; their eventual outcome is not claimed green. Normal squash, no admin override or bypass.

Live iPhone 12 proof is explicitly a separate follow-up after confirmation that both server description and compact-history changes are live in production. It will use existing qa-batch-76eca2, run Python, and run shell only if compute is already attached. No server creation, provider changes, compute attachment, or Preview upload. No live proof is claimed yet.