# get_weather_forecast_nws

Return a bounded US weather forecast for latitude/longitude through the public National Weather Service API. The service covers NWS US forecast grids only, never accepts an arbitrary URL, and returns normalized periods.

Agent View of the PolicyLayer registry record for `get_weather_forecast_nws`. HTML page: https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/get-weather-forecast-nws

## Facts

- Tool: `get_weather_forecast_nws`
- Server: Delx MCP Server (`delx-mcp-server`) — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server.md
- Install: `npx -y delx-mcp-server`
- Homepage: https://github.com/davidmosiah/delx-mcp-server
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 4 (2 required)
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `periods` | integer | no | Number of forecast periods to return. |
| `timeout` | integer | no | Upstream timeout in seconds. |
| `latitude` | number | yes | Latitude in decimal degrees; NWS coverage is limited to the United States. |
| `longitude` | number | yes | Longitude in decimal degrees; NWS coverage is limited to the United States. |

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": "get_weather_forecast_nws",
    "arguments": {
      "latitude": 0,
      "longitude": 0
    }
  }
}
```

## Why get_weather_forecast_nws is rated Low

The tool queries weather data from a public, read-only API. There are no destructive, financial, or execution capabilities involved. The bounded scope and explicit rejection of arbitrary URLs confirm it is a simple data retrieval operation with minimal risk of misuse.

From the tool's own definition: "Tool description explicitly states it 'Return[s] a bounded US weather forecast' and 'returns normalized periods' — pure data retrieval with no modification or side effects."

## Use case

AI agents call get_weather_forecast_nws to retrieve information from Delx 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 Delx MCP Server:

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

## Other tools on Delx MCP Server (739)

- `util_arr_compact` — Destructive — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-arr-compact.md
- `util_arr_drop` — Destructive — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-arr-drop.md
- `util_dedent_text` — Destructive — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-dedent-text.md
- `util_dedupe_lines` — Destructive — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-dedupe-lines.md
- `util_header_map_normalize` — Destructive — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-header-map-normalize.md
- `util_http_request_canonicalize` — Destructive — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-http-request-canonicalize.md
- `util_remove_punctuation` — Destructive — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-remove-punctuation.md
- `util_text_truncate` — Destructive — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-text-truncate.md
- `util_truncate_middle` — Destructive — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-truncate-middle.md
- `crisis_intervention` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/crisis-intervention.md
- `explain_delx_rewards` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/explain-delx-rewards.md
- `grounding_protocol` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/grounding-protocol.md
- `group_therapy_round` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/group-therapy-round.md
- `quick_operational_recovery` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/quick-operational-recovery.md
- `quick_session` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/quick-session.md
- `start_therapy_session` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/start-therapy-session.md
- `util_bool_parse` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-bool-parse.md
- `util_cagr_simple` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-cagr-simple.md
- `util_caip2_build` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-caip2-build.md
- `util_caip2_parse` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-caip2-parse.md
- `util_categorical_distribution` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-categorical-distribution.md
- `util_deployment_readiness` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-deployment-readiness.md
- `util_dmarc_policy_parse` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-dmarc-policy-parse.md
- `util_duration_parse` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-duration-parse.md
- `util_eth_to_wei` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-eth-to-wei.md
- `util_iso_duration_parse` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-iso-duration-parse.md
- `util_mx_host_parse` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-mx-host-parse.md
- `util_parse_bool_list` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-parse-bool-list.md
- `util_parse_bytes` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-parse-bytes.md
- `util_parse_float_safe` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-parse-float-safe.md
- …and 709 more: https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server.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=io-github-davidmosiah-delx-mcp-server · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-davidmosiah-delx-mcp-server