# who.health.dimension_values

List valid values for a WHO GHO dimension such as countries (COUNTRY), WHO regions (REGION), sex categories (SEX), age groups (AGEGROUP), or world bank income groups (WORLDBANKINCOMEGROUP). Essential for discovering valid filter values before querying indicator data. Returns codes and human-readable titles for all values in the dimension. No auth — WHO public reference data, unlimited free.

Agent View of the PolicyLayer registry record for `who.health.dimension_values`. HTML page: https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/who.health.dimension-values

## Facts

- Tool: `who.health.dimension_values`
- Server: Apibase (`apibase-mcp-client`) — https://policylayer.com/tools/io-github-whiteknightonhorse-apibase.md
- Install: `npx -y apibase-mcp-client`
- Homepage: https://github.com/whiteknightonhorse/APIbase
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server rate-limited: no
- Parameters: 3 (1 required)
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `limit` | integer | no | Maximum number of values to return (1–100, default 20). |
| `search` | string | no | Filter dimension values by partial title match (e.g. "africa" to filter African countries). |
| `dimension` | string | yes | Dimension code to list values for (e.g. "COUNTRY" for country codes, "REGION" for WHO regions, "SEX" for sex categories, "AGEGROUP" for age groups). |

Parameters from the server's own tool schema.

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

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "who.health.dimension_values",
    "arguments": {
      "dimension": "<dimension>"
    }
  }
}
```

## Why who.health.dimension_values is rated Low

Retrieves public reference data with no side effects or authentication requirements.

From the tool's own definition: "List valid values for WHO GHO dimension; returns codes and human-readable titles"

## Use case

AI agents call who.health.dimension_values to retrieve information from Apibase 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 Apibase:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "who.health.dimension_values": {}
  }
}
```

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## 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=io-github-whiteknightonhorse-apibase · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-whiteknightonhorse-apibase