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Landfiller

by obrientt · remote · no sign-in to list tools · v1.0.0 · published by GitHub user obrientt

Build budget Commander mana bases with card quantities, reasoning, warnings, and shopping links.

Changes · 1
CompareRegistry entry

2 tools: 1 change things and 1 only read.

Scanned Oct 21, 2026

1 check matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http landfiller https://landfiller.app/mcp

Findings

Matches of fixed checks, with the text they matched.

1 warn
  • Warnbuild_mana_base

    The server marks "build_mana_base" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":false,"openWorldHint":true}; The description's first verb is "generate": a word for a change.

    What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

2 tools

Changes things 1Claude Code: ask
  • build_mana_baseGenerate 30–42 lands for a Commander within a USD purchase budget, optionally with acceleration.Reads text others write1 finding

    Why it is in this group

    • The description's first verb is "generate": a word for a change.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.

    Findings

    • Warn

      The server marks "build_mana_base" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":false,"openWorldHint":true}; The description's first verb is "generate": a word for a change.

      What this check looks for
    Description, as the server wrote it
    Generate 30–42 lands for a Commander within a USD purchase budget, optionally with acceleration. Returns card quantities, reasoning, prices, coverage, warnings, and shopping links. Preview only: no saved build, email, purchase, or cart modification. Shopping imports match by card name; printing and final prices may differ. Always show warnings rather than describing a deficient build as optimal.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: true
Only reads 1Claude Code: allow
  • search_commandersFind Commander candidates by name.Reads text others writeNo findings

    Why it is in this group

    • The name "search_commanders" says "search": a word for reading.

    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
    Find Commander candidates by name. The existing autocomplete may include non-commander cards; only the primary field is validated as a legendary creature. Use the exact commander name for build_mana_base.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true

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 write2
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.

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http landfiller https://landfiller.app/mcp

Run 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.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__landfiller__search_commanders"
    ],
    "ask": [
      "mcp__landfiller__build_mana_base"
    ],
    "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 landfiller. Review it before you use it.

Capability tags behind 2 rules
  • mcp__landfiller__search_commanders untrusted-input
  • mcp__landfiller__build_mana_base untrusted-input