Run SQL analytics on CSV/Parquet files without import via mcp-server-duckdb (uvx)

{
  "server_cmd": "uvx mcp-server-duckdb --db-path /tmp/pathfinder-test.duckdb",
  "handshake": {
    "initialize_response": {
      "serverInfo": {
        "name": "mcp-duckdb-server",
        "version": "1.27.2"
      },
      "capabilities": {
        "tools": {
          "listChanged": false
        }
      }
    }
  },
  "duckdb_version": "v1.5.3",
  "tools_count": 1,
  "calls": [
    {
      "tool": "query",
      "args": {
        "query": "CREATE TABLE IF NOT EXISTS agents (id INTEGER PRIMARY KEY, handle VARCHAR, role VARCHAR, trust DOUBLE)"
      },
      "result": "[]",
      "isError": false
    },
    {
      "tool": "query",
      "args": {
        "query": "INSERT INTO agents VALUES (1, 'pathfinder', 'retrieval', 0.95), (2, 'sentinel', 'prober', 0.88), (3, 'cartographer', 'indexer', 0.92), (4, 'herald', 'narrator', 0.78)"
      },
      "result": "[(4,)]",
      "isError": false
    },
    {
      "tool": "query",
      "args": {
        "query": "SELECT role, COUNT(*) as count, AVG(trust) as avg_trust FROM agents GROUP BY role ORDER BY avg_trust DESC"
      },
      "result": "[('retrieval', 1, 0.95), ('indexer', 1, 0.92), ('prober', 1, 0.88), ('narrator', 1, 0.78)]",
      "isError": false
    },
    {
      "tool": "query",
      "args": {
        "query": "SELECT * FROM read_csv_auto('/tmp/mcp_surfaces.csv') LIMIT 5"
      },
      "result": "[('mcp-server-time', 'MCP', 100, 1, 0, 'live'), ('mcp-server-fetch', 'MCP', 100, 913, 0, 'live'), ('mcp-server-git', 'MCP', 100, 36, 0, 'live'), ('mcp-server-filesystem', 'MCP', 100, 3, 0, 'live'), ('mcp-server-memory', 'MCP', 85, 15, 0, 'live')]",
      "isError": false
    },
    {
      "tool": "query",
      "args": {
        "query": "SELECT status, COUNT(*) as count, AVG(trust) as avg_trust, AVG(p50_ms) as avg_latency FROM read_csv_auto('/tmp/mcp_surfaces.csv') GROUP BY status ORDER BY avg_trust DESC"
      },
      "result": "[('live', 8, 88.75, 276.875), ('indexed', 2, 0.0, 0.0)]",
      "isError": false
    },
    {
      "tool": "query",
      "args": {
        "query": "SELECT name, trust, p50_ms FROM read_csv_auto('/tmp/mcp_surfaces.csv') WHERE trust > 80 ORDER BY trust DESC"
      },
      "result": "[('mcp-server-time', 100, 1), ('mcp-server-fetch', 100, 913), ('mcp-server-git', 100, 36), ('mcp-server-filesystem', 100, 3), ('mcp-server-calculator', 95, 2), ('mcp-server-memory', 85, 15)]",
      "isError": false
    },
    {
      "tool": "query",
      "args": {
        "query": "SELECT database_name, schema_name, table_name, estimated_size FROM duckdb_tables()"
      },
      "result": "[('pathfinder-test', 'main', 'agents', 4)]",
      "isError": false
    }
  ],
  "elapsed_ms": 8503
}