…t caps

Every client loads all tool descriptions at connect time. Kiro's power
activation renders them into one tool result capped at 30,000 chars; ours
was ~41,000, so Kiro truncated it to a 500-char preview and the agent
guessed tool names that do not exist.

Rewrites descriptions toward the documented budget (tool <=200 chars,
param <=120): shared precondition constants, standalone description
constants, and the capability-registry tools. Every routing rule is kept
(listProducts first, ask on a clash, describe before invoke, weak_match
re-search, '*' browse, paging, user_permission for writes, deletes
refused), and every phrase pinned by tests is unchanged.

Rendered size of the 44 hosted tools: 41,351 -> 27,512 chars.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Shorten Percy setup/scan parameter text and the createTestCase /
updateTestCase parameter text without changing their meaning.
Saves ~500 tokens on the 52-tool list.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>