# Microgram: dataframe-select

`station__algovigilance__microgram-dataframe-select` · native (always callable) · domain `algovigilance` · pv-relevance `pv-core`

Select a subset of columns from a DataFrame, optionally dropping columns instead.

## Agent metadata

- `idempotent`: true
- `read_only`: true
- `expected_latency_ms`: unknown (not yet contract-tested)
- `cost_tokens_estimate`: unknown

## Input schema

- `columns` *object* (required) — Column name to array of values
- `keep` *object* — Column names to keep (mutually exclusive with drop)
- `drop` *object* — Column names to drop (mutually exclusive with keep)

## Example call

```json
POST /api/mcp
Content-Type: application/json

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "station__algovigilance__microgram-dataframe-select",
    "arguments": {
      "columns": {}
    }
  }
}
```

## Related

- [/tools](/tools) — all 7718 tools
- [/tools/algovigilance__microgram-dataframe-select](/tools/algovigilance__microgram-dataframe-select) — HTML page
- [/tools/algovigilance__microgram-dataframe-select/json](/tools/algovigilance__microgram-dataframe-select/json) — JSON form (agent-friendly)
- [/api/mcp](/api/mcp) — endpoint
- [/AGENTS.md](/AGENTS.md) — agent guide