# Microgram: observatory-viz-centrality

`station__algovigilance__microgram-observatory-viz-centrality` · native (always callable) · domain `algovigilance` · pv-relevance `pv-core`

/// Supports degree, betweenness, closeness, eigenvector, or all four.

## Agent metadata

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

## Input schema

- `edges_json` *string* (required) — JSON array of edge pairs: `[["hub","a"], ["hub","b"]]`
- `metric` *string* (required) — Input parameter metric.
- `nodes_json` *string* (required) — JSON array of node ID strings: `["hub", "a", "b", "c"]`

## Example call

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

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "station__algovigilance__microgram-observatory-viz-centrality",
    "arguments": {
      "edges_json": "",
      "metric": "",
      "nodes_json": ""
    }
  }
}
```

## Related

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