{
  "checker": {
    "claims": [
      {
        "claim": "All LocalStack MCP tools require a token",
        "command": "node dist/cli.js tools/call {\"tool\": \"localstack-docs\", \"arguments\": {\"query\": \"S3 event notifications\", \"limit\": 1}}",
        "evidence": "LOCALSTACK_AUTH_TOKEN is required for this operation.\"}]}",
        "expected": "tool refuses with an auth-token error",
        "input": "{\"tool\": \"localstack-docs\", \"arguments\": {\"query\": \"S3 event notifications\", \"limit\": 1}}",
        "kind": "claim",
        "outcome": "Real input produced the expected result: LOCALSTACK_AUTH_TOKEN is required for this operation.",
        "source": "All LocalStack MCP tools require `LOCALSTACK_AUTH_TOKEN` to be set.",
        "source_checked": true,
        "source_file": "README.md",
        "verdict": "yes"
      },
      {
        "claim": "Tools require the auth token in the MCP tool list",
        "command": "node dist/cli.js tools/call {\"tool\": \"localstack-docs\", \"arguments\": {\"query\": \"S3 event notifications\", \"limit\": 1}}",
        "evidence": "Auth Token Required**\\n\\nLOCALSTACK_AUTH_TOKEN is required for this operation.\"}]}",
        "expected": "tool refuses with an auth-token error",
        "input": "{\"tool\": \"localstack-docs\", \"arguments\": {\"query\": \"S3 event notifications\", \"limit\": 1}}",
        "kind": "claim",
        "outcome": "Real input produced the expected result: Auth Token Required",
        "source": "All tools in this MCP server require `LOCALSTACK_AUTH_TOKEN`.",
        "source_checked": true,
        "source_file": "README.md",
        "verdict": "yes"
      }
    ],
    "cycle_checks": [
      {
        "claim": "Scheduled or looping main behavior",
        "command": "",
        "evidence": "Entry points inspected: README.md, package.json scripts (start = node dist/cli.js), src/cli/index.ts/lifecycle.ts. The product is a request-driven stdio MCP server: it answers tools/call requests from the client and exits when stdin closes. Only timers found are an internal health-poll loop during LocalStack container start (src/lib/localstack/localstack.utils.ts scheduleNextPoll) and stdin-exit scheduling (src/cli/lifecycle.ts); neither is a user-facing cron, --once, --now or webhook cycle. No cycle triggered.",
        "expected": "identify the product trigger",
        "input": "source inspection",
        "kind": "cycle",
        "outcome": "Entry points inspected: README.md, package.json scripts (start = node dist/cli.js), src/cli/index.ts/lifecycle.ts. The product is a request-driven stdio MCP server: it answers tools/call requests from the client and exits when stdin closes. Only timers found are an internal health-poll loop during LocalStack container start (src/lib/localstack/localstack.utils.ts scheduleNextPoll) and stdin-exit scheduling (src/cli/lifecycle.ts); neither is a user-facing cron, --once, --now or webhook cycle. No cycle triggered.",
        "source": "repository entry points",
        "verdict": "yes"
      }
    ],
    "details": {
      "checks": [
        {
          "check": "credentials_error",
          "details": {
            "argv": [
              "node",
              "dist/cli.js"
            ],
            "kind": "mcp",
            "scope": "partial: credentials_error",
            "serverInfo": {
              "description": "Manage and interact with LocalStack for local cloud development and testing",
              "icons": [
                {
                  "mimeType": "image/png",
                  "sizes": [
                    "256x256"
                  ],
                  "src": "https://raw.githubusercontent.com/localstack/localstack-mcp-server/main/icon.png"
                }
              ],
              "name": "LocalStack",
              "version": "0.7.0"
            },
            "tool_result": {
              "content": [
                {
                  "text": "\u274c **Auth Token Required**\n\nLOCALSTACK_AUTH_TOKEN is required for this operation.",
                  "type": "text"
                }
              ]
            },
            "tool_result_checked": true,
            "tool_schema_bytes": 20791,
            "tools": [
              "localstack-app-inspector",
              "localstack-aws-client",
              "localstack-aws-replicator",
              "localstack-azure-client",
              "localstack-chaos-injector",
              "localstack-cloud-pods",
              "localstack-deployer",
              "localstack-docs",
              "localstack-ephemeral-instances",
              "localstack-extensions",
              "localstack-iam-policy-analyzer",
              "localstack-logs-analysis",
              "localstack-management",
              "localstack-snowflake-client",
              "localstack-state-management"
            ],
            "working": false
          },
          "optional": false,
          "status": "PASS"
        }
      ],
      "scope": "partial checks",
      "working": true
    },
    "evidence_strength": "readme_checked",
    "example_checks": [
      {
        "claim": "Offline unit test suite passes",
        "command": "yarn test",
        "deferred": false,
        "evidence": "c.test.ts\nPASS src/lib/localstack/platform.client.test.ts\nPASS src/lib/wizard/env-parser.logic.test.ts\nPASS src/lib/azure/runtime-status.test.ts\nPASS src/cli/lifecycle.test.ts\nPASS src/lib/azure/child-env.test.ts\nPASS src/core/preflight.test.ts\nPASS src/core/localstack-env.test.ts\nPASS src/lib/wizard/entry-builders.logic.test.ts\nPASS src/lib/wizard/server-config.logic.test.ts\nPASS src/lib/wizard/paths.logic.test.ts\nPASS src/lib/azure/config.test.ts\n\nTest Suites: 38 passed, 38 total\nTests:       395 passed, 395 total\nSnapshots:   0 total\nTime:        11.95 s, estimated 13 s\nRan all test suites.",
        "expected": "all jest suites pass",
        "input": "yarn test",
        "kind": "example",
        "outcome": "command completed successfully",
        "returncode": 0,
        "source": "README.md Contributing section (MCP Server Tester notes); package.json test script",
        "verdict": "yes"
      },
      {
        "claim": "Direct MCP server tests",
        "command": "",
        "deferred": false,
        "evidence": "yarn test:mcp:direct requires LOCALSTACK_AUTH_TOKEN for MCP tool usage per README; no token available, so not run",
        "expected": "documented command completes successfully",
        "input": "",
        "kind": "example",
        "outcome": "yarn test:mcp:direct requires LOCALSTACK_AUTH_TOKEN for MCP tool usage per README; no token available, so not run",
        "source": "README.md MCP Server Tester section",
        "verdict": "blocked"
      }
    ],
    "status": "PASS"
  },
  "deviations": [
    "Node.js and npm were absent; installed Node 22.23.4 from NodeSource apt repo (README requires Node 20+).",
    "yarn was absent; installed yarn 1.22.22 globally with npm (README uses yarn).",
    "Docker was absent; installed docker.io 29.1.3 via apt (README prerequisite). No LocalStack image was pulled because the start action is gated by the auth token.",
    "LOCALSTACK_AUTH_TOKEN not available; not obtained or faked. Probe recorded as a credentials_error check on the documented tool call, not a successful tool result.",
    "yarn test:mcp:direct not run (requires the auth token per README).",
    "/inputs/coldpass-preflight.py does not exist in this guest; used <guest-path> as instructed in the task's validation command, which passed."
  ],
  "fault_owner": "prerequisite",
  "main_blocker": null,
  "operation": "Build the LocalStack MCP server from source (yarn build) and run its stdio server, then call a real tool (localstack-docs search) to confirm behavior",
  "operation_scope": "Node.js >= 20 (installed v22.23.4), yarn 1.22.22, Docker 29.1.3 (daemon up). Build and offline jest suite (395 tests) verified. Every MCP tool requires LOCALSTACK_AUTH_TOKEN, which is not present in this guest and was not obtained, so LocalStack start, deploy, logs and docs search could not be exercised successfully. The no-token tool call returns the documented 'Auth Token Required' error.",
  "outcome": "working",
  "plain_failure": "The server builds and starts, and its tools answer, but every tool stops with 'LOCALSTACK_AUTH_TOKEN is required'. A LocalStack account token is needed to run the operations (start LocalStack, deploy, logs, docs search), and it was not available in this disposable VM, so those operations were not exercised.",
  "steps": [
    "git init; git remote add origin https://github.com/localstack/localstack-mcp-server; git fetch --depth 1 origin afeff462768d4fc7ac719ba8e9895233e6aa72cf; git reset --mixed FETCH_HEAD",
    "Install Node.js 22 (NodeSource setup_22.x + apt install nodejs) and yarn (sudo npm install -g yarn@1)",
    "yarn install --frozen-lockfile (exit 0; optional cpu-features native build warning ignored per yarn)",
    "yarn build (xmcp build + esbuild -> dist/cli.js; 15 tools, 1 prompt)",
    "node dist/cli.js (stdio MCP server, README 'Run from source'); tools/call localstack-docs -> 'Auth Token Required'",
    "yarn test (jest): 38 suites, 395 tests passed"
  ],
  "stuck_step": "Running LocalStack-backed tools: every tool, including localstack-docs, requires LOCALSTACK_AUTH_TOKEN before doing any work.",
  "suggested_fix": "Re-run in a guest where LOCALSTACK_AUTH_TOKEN is set to a valid LocalStack Auth Token (and Docker is available to start the LocalStack container), then replay probe.json and claims with the token exported. No product change is needed."
}