Arcana
com.arcanasf/arcanaarcanasf.comstreamable-httpv1.0.1Scanned
Arcana: San Francisco wine bar, restaurant, art space and music venue. Reservations, private events.
6 tools: 1 do something that can't be undone, 2 change things and 3 only read.
- Reads private data · 0
- Reads text others write · 1
- Can send data out · 0
- 1 finding
Anlyon alternative
3 of these tools change something. Run those as governed actions.
Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.
Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.
Import an OpenAPI spec →Tools
Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.
6 tools
Can't be undone 1Claude Code: ask
submit_inquirySends a private-event inquiry to the Arcana booking team.Reads text others writeNo findings
Why it is in this group
- The name "submit_inquiry" says "submit": a word for a change.
- The description's first verb is "send": a word for sending, and what is sent cannot be taken back.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it Sends a private-event inquiry to the Arcana booking team. Use only after the person has seen these details and asked you to send them. Requires first and last name, email, occasion, guest count, event date, start and end time, and one total budget amount in US dollars. Ask the person for anything missing. A reply goes to the email given.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: true
Changes things 2Claude Code: ask
get_business_infoStart here.1 finding
Why it is in this group
- The name "get_business_info" says "get": a word for reading.
- The description's first verb is "start": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Findings
- Warn
The server marks "get_business_info" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
What this check looks forMatched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "get_business_info" says "get": a word for reading.
Description, as the server wrote it Start here. What Arcana is, its hours, location, and contact links, every part of what it offers, and links to each.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
prepare_inquiryPrepares a prefilled link for a private-event inquiry from whatever details are known.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it Prepares a prefilled link for a private-event inquiry from whatever details are known. The person reviews the form and submits it.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
Only reads 3Show 3 read-only tools
get_private_event_offerReturns Arcana qualitative private-event offerings and the inquiry form link.No findings
Why it is in this group
- The name "get_private_event_offer" says "get": a word for reading.
Description, as the server wrote it Returns Arcana qualitative private-event offerings and the inquiry form link.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
get_reservation_optionsReturns walk-in guidance and the public Resy reservation link.No findings
Why it is in this group
- The name "get_reservation_options" says "get": a word for reading.
Description, as the server wrote it Returns walk-in guidance and the public Resy reservation link.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
list_upcoming_eventsReturns upcoming public events at Arcana as published on Resident Advisor and Luma, with a link to each listing.No findings
Why it is in this group
- The name "list_upcoming_events" says "list": a word for reading.
Description, as the server wrote it Returns upcoming public events at Arcana as published on Resident Advisor and Luma, with a link to each listing. The list refreshes once a day, so the listing is the authority for tickets and changes.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.
Exfil surface
Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.
No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data or outbound.
- Reads private data0
- Reads files, mail, messages, databases, secrets, calendars or repositories.
- Reads text others write1
- Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
- Can send data out0
- Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.
Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.
Findings
Matches of fixed checks, with the text they matched.
The server marks "get_business_info" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
What this check looks forMatched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "get_business_info" says "get": a word for reading.
History
Changes to its tool definitions and to its remote endpoint, newest first.
No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.
Install
Pinned to version 1.0.1. Values in angle brackets are yours to fill in.
claude mcp add --transport http arcana https://mcp.arcanasf.com/mcpclaude mcp add --transport http arcana https://mcp.arcanasf.com/mcpRun in a terminal.
Claude Code permissions
Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.
{
"permissions": {
"allow": [
"mcp__arcana__get_reservation_options",
"mcp__arcana__get_private_event_offer",
"mcp__arcana__list_upcoming_events"
],
"ask": [
"mcp__arcana__get_business_info",
"mcp__arcana__prepare_inquiry",
"mcp__arcana__submit_inquiry"
],
"deny": []
}
}Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as arcana. Review it before you use it.
Capability tags behind 1 rule
- mcp__arcana__submit_inquiry untrusted-input
Pin
Keep the decision: fail CI when the tools change, follow every change, or show a badge.
Pin in CI
Fail a build when the tools you reviewed are not the tools the server serves today.
curl -s "https://anlyon.dev/api/v1/servers/com.arcanasf/arcana/verify?hash=293e329c90a369407a3cbf3d63f7ca655f51af7bd6469e5535f9af37e71bbae3" | jq -e '.changed == false'Pinned hash 293e329c90a3, from Nov 1, 2026, 01:17 UTC.
Watch
Get told when its tools change: a new tool, a new description, a new class.
https://anlyon.dev/servers/com.arcanasf/arcana/changes.xmlAn Atom feed. Works in any feed reader or Slack's RSS app.
Badge
[](https://anlyon.dev/servers/com.arcanasf/arcana)Source: MCP Registry. Synced Nov 1, 2026, 01:17 UTC.