# ea-hydrology.readings.range

Get a date-ranged time series of readings (date, value, quality, completeness) for one EA hydrology data series, identified by the measure_id from ea-hydrology.station_measures. Requires min_date and max_date (YYYY-MM-DD, inclusive). Data: environment.data.gov.uk/hydrology, UK Open Government Licence v3.0, no auth required.

Agent View of the PolicyLayer registry record for `ea-hydrology.readings.range`. HTML page: https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/ea-hydrology.readings.range

## Facts

- Tool: `ea-hydrology.readings.range`
- 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: 4 (3 required)
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `limit` | integer | no | Max readings to return (default 500, max 2000). |
| `max_date` | string | yes | End date (inclusive), format YYYY-MM-DD. |
| `min_date` | string | yes | Start date (inclusive), format YYYY-MM-DD. |
| `measure_id` | string | yes | Measure identifier returned by ea-hydrology.station_measures. |

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": "ea-hydrology.readings.range",
    "arguments": {
      "max_date": "<max_date>",
      "min_date": "<min_date>",
      "measure_id": "<measure_id>"
    }
  }
}
```

## Why ea-hydrology.readings.range is rated Low

Retrieves historical hydrology measurement data within specified date range with no side effects.

From the tool's own definition: "Get a date-ranged time series of readings; no auth required; public government data"

## Use case

AI agents call ea-hydrology.readings.range 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": {
    "ea-hydrology.readings.range": {}
  }
}
```

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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
