Add MCP tool titles, annotations, prompts, and resource

[nspady]

Summary

• Add title and annotations (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to all 13 MCP tools
• Add two prompt templates: daily-agenda-brief and find-and-book-meeting
• Add calendar-accounts resource exposing connected accounts and deduplicated calendars
• Migrate manage-accounts from deprecated server.tool() to server.registerTool()
• Fix idempotentHint for update-event (PUT semantics) and respond-to-event (same response = no change)
• Add error handling to resource callback with proper McpError wrapping

Test plan

• All 802 unit tests pass (npm test -- --run)
• TypeScript type checking passes (npm run lint)
• Verify tool titles/annotations appear in MCP Inspector
• Verify prompts render correctly via MCP client
• Verify calendar-accounts resource returns expected JSON

🤖 Generated with Claude Code

[github-actions]

📊 Tool Description Token Analysis

Summary

Metric	Baseline	PR	Diff
Total Tokens	7,356	7,356	— (0.0%)
Duplicate Patterns	16	16	—
Potential Savings	605	605	—

Full token breakdown by tool

Tool	Desc	Props	Names	Types	Enums	Overhead	Total
create-event	6	1066	141	31	131	838	2213
update-event	12	611	88	28	55	586	1380
create-events	39	362	72	5	64	530	1072
search-events	10	197	17	9	0	380	613
list-events	16	160	16	8	0	397	597
get-freebusy	28	139	16	7	0	184	374
respond-to-event	22	208	12	8	27	93	370
get-event	9	75	5	4	0	185	278
delete-event	5	41	6	4	8	80	144
get-current-time	29	37	3	2	0	52	123
list-calendars	4	27	1	1	0	85	118
list-colors	10	16	1	1	0	46	74

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Analysis generated at 2026-03-03T04:42:48.554Z