# list_oncall_users

List users from Grafana OnCall. Can retrieve all users, a specific user, or filter by username

Agent View of the PolicyLayer registry record for `list_oncall_users`. HTML page: https://policylayer.com/tools/0xteamhq-mcp-grafana/list-oncall-users

## Facts

- Tool: `list_oncall_users`
- Server: Grafana MCP Server (`0xteamhq/mcp-grafana`) — https://policylayer.com/tools/0xteamhq-mcp-grafana.md
- Homepage: https://github.com/0xteamhq/mcp-grafana
- Risk category: Read (Low risk)
- Registry record: grade C, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Allowed

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "list_oncall_users",
    "arguments": {}
  }
}
```

## Why list_oncall_users is rated Low

This tool performs read-only data retrieval from Grafana OnCall's user database. It supports listing and filtering users but does not create, modify, delete, or execute any actions. The blast radius of misuse is minimal—an attacker could enumerate oncall users but cannot compromise systems or data through this tool alone.

From the tool's own definition: "Tool description states 'List users' and 'retrieve all users, a specific user, or filter by username' — these are query operations with no modification, deletion, or execution of side effects."

## Use case

AI agents call list_oncall_users to retrieve information from Grafana MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Grafana MCP Server:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_oncall_users": {}
  }
}
```

## Other tools on Grafana MCP Server (42)

- `query_loki_logs` — Execute — https://policylayer.com/tools/0xteamhq-mcp-grafana/query-loki-logs.md
- `fetch_pyroscope_profile` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/fetch-pyroscope-profile.md
- `find_error_pattern_logs` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/find-error-pattern-logs.md
- `find_slow_requests` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/find-slow-requests.md
- `generate_deeplink` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/generate-deeplink.md
- `get_alert_rule_by_uid` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/get-alert-rule-by-uid.md
- `get_assertions` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/get-assertions.md
- `get_current_oncall_users` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/get-current-oncall-users.md
- `get_dashboard_by_uid` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/get-dashboard-by-uid.md
- `get_dashboard_panel_queries` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/get-dashboard-panel-queries.md
- `get_dashboard_property` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/get-dashboard-property.md
- `get_dashboard_summary` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/get-dashboard-summary.md
- `get_datasource_by_name` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/get-datasource-by-name.md
- `get_datasource_by_uid` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/get-datasource-by-uid.md
- `get_incident` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/get-incident.md
- `get_oncall_shift` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/get-oncall-shift.md
- `get_sift_analysis` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/get-sift-analysis.md
- `get_sift_investigation` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/get-sift-investigation.md
- `list_alert_rules` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/list-alert-rules.md
- `list_contact_points` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/list-contact-points.md
- `list_datasources` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/list-datasources.md
- `list_incidents` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/list-incidents.md
- `list_loki_label_names` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/list-loki-label-names.md
- `list_loki_label_values` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/list-loki-label-values.md
- `list_oncall_schedules` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/list-oncall-schedules.md
- `list_oncall_teams` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/list-oncall-teams.md
- `list_prometheus_label_names` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/list-prometheus-label-names.md
- `list_prometheus_label_values` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/list-prometheus-label-values.md
- `list_prometheus_metric_metadata` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/list-prometheus-metric-metadata.md
- `list_prometheus_metric_names` — Read — https://policylayer.com/tools/0xteamhq-mcp-grafana/list-prometheus-metric-names.md
- …and 12 more: https://policylayer.com/tools/0xteamhq-mcp-grafana.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=0xteamhq-mcp-grafana · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/0xteamhq-mcp-grafana