{
  "checker": {
    "claims": [
      {
        "claim": "Execute SQL queries using chDB's embedded ClickHouse engine.",
        "command": "uv run --with 'mcp-clickhouse[chdb]' --python 3.12 mcp-clickhouse tools/call {\"tool\": \"run_chdb_select_query\", \"arguments\": {\"query\": \"SELECT 42 AS answer\"}}",
        "evidence": "42}]\", \"type\": \"text\"}], \"isError\": false, \"structuredContent\": {\"result\": \"[{\\\"answer\\\": 42}]\"}}",
        "expected": "42",
        "input": "{\"tool\": \"run_chdb_select_query\", \"arguments\": {\"query\": \"SELECT 42 AS answer\"}}",
        "kind": "claim",
        "outcome": "Real input produced the expected result: 42",
        "source": "* Execute SQL queries using [chDB](https://github.com/chdb-io/chdb)'s embedded ClickHouse engine.",
        "source_checked": true,
        "source_file": "README.md",
        "verdict": "yes"
      }
    ],
    "cycle_checks": [
      {
        "claim": "Scheduled or looping main behavior",
        "command": "",
        "evidence": "Inspected README entrypoints and main.py: the product serves MCP requests and has no scheduler, loop trigger, webhook, or one-shot cycle behavior.",
        "expected": "identify the product trigger",
        "input": "source inspection",
        "kind": "cycle",
        "outcome": "Inspected README entrypoints and main.py: the product serves MCP requests and has no scheduler, loop trigger, webhook, or one-shot cycle behavior.",
        "source": "repository entry points",
        "verdict": "yes"
      }
    ],
    "details": {
      "argv": [
        "uv",
        "run",
        "--with",
        "mcp-clickhouse[chdb]",
        "--python",
        "3.12",
        "mcp-clickhouse"
      ],
      "kind": "mcp",
      "scope": "product operation",
      "serverInfo": {
        "name": "mcp-clickhouse",
        "version": "0.7.0"
      },
      "tool_result": {
        "_meta": {
          "fastmcp": {
            "wrap_result": true
          }
        },
        "content": [
          {
            "text": "[{\"answer\": 42}]",
            "type": "text"
          }
        ],
        "isError": false,
        "structuredContent": {
          "result": "[{\"answer\": 42}]"
        }
      },
      "tool_result_checked": true,
      "tool_schema_bytes": 4327,
      "tools": [
        "list_databases",
        "list_tables",
        "run_query",
        "run_chdb_select_query"
      ],
      "working": true
    },
    "evidence_strength": "readme_checked",
    "example_checks": [
      {
        "claim": "README chDB tool usage",
        "command": "uv run --with 'mcp-clickhouse[chdb]' --python 3.12 mcp-clickhouse",
        "deferred": false,
        "evidence": "\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u256f\n\u256d\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u256e\n\u2502                          \ud83c\udf89 Update available: 4.1.3                          \u2502\n\u2502                      Run: pip install --upgrade fastmcp                      \u2502\n\u2570\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u256f\n\n\n[10/25/26 22:54:43] INFO     Starting MCP server                transport.py:242\n                             'mcp-clickhouse' with transport                    \n                             'stdio'",
        "expected": "42",
        "input": "SELECT 42 AS answer",
        "kind": "example",
        "outcome": "command completed successfully",
        "returncode": 0,
        "source": "README.md, chDB Tools",
        "verdict": "yes"
      }
    ],
    "status": "PASS"
  },
  "deviations": [
    "The first manually piped MCP exchange ended with Connection closed before the tool call; the supplied checker replay uses proper stdio MCP framing and successfully executed the real query."
  ],
  "fault_owner": null,
  "main_blocker": null,
  "operation": "Run an embedded chDB SQL query through the MCP tool run_chdb_select_query.",
  "operation_scope": "stdio MCP server, Python 3.12.3, and optional chDB dependency; no external ClickHouse service required for this query.",
  "outcome": "working",
  "plain_failure": null,
  "steps": [
    "Read README.md and confirmed Python 3.12 is recommended and supported.",
    "Installed and launched with the documented uv run --with 'mcp-clickhouse[chdb]' --python 3.12 mcp-clickhouse command.",
    "Enabled chDB and called run_chdb_select_query with SELECT 42 AS answer; received [{\"answer\": 42}].",
    "Validated and replayed probe, README claim, example, and cycle inspection with the Coldpass checker; all passed."
  ],
  "stuck_step": null,
  "suggested_fix": null
}