# watchers.weather-alert WATCHER: get a signed callback when the US National Weather Service issues a new alert for an area. Arm once, pay once. Pass area (2-letter state/territory code, e.g. CA, TX); optionally severity to only fire at/above a level (Minor/Moderate/Severe/Extreme). Fires once per new alert (deduped by id); bounded by maxFires/expiry. Active alerts at arm time are baselined. Free public-domain (NWS). Sign Agent View of the PolicyLayer registry record for `watchers.weather-alert`. HTML page: https://policylayer.com/tools/io-github-2s-io-mcp/watchers.weather-alert ## Facts - Tool: `watchers.weather-alert` - Server: Mcp (`@2sio/mcp`) — https://policylayer.com/tools/io-github-2s-io-mcp.md - Install: `npx -y @2sio/mcp` - Homepage: https://github.com/2s-io/sdk - Risk category: Read (Low risk) - Registry record: grade F, 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": "watchers.weather-alert", "arguments": {} } } ``` ## Why watchers.weather-alert is rated Low This tool queries the National Weather Service API and delivers alerts via callback. It reads publicly available weather alert data, applies optional filters, and notifies the caller. No data is created, modified, deleted, or executed in the target system. The financial component (pay-per-call via x402) is incidental infrastructure, not a direct financial action by the tool itself. From the tool's own definition: "Tool description: 'get a signed callback when the US National Weather Service issues a new alert for an area' — retrieves alert data from a public service with no side effects." ## Use case AI agents call watchers.weather-alert to retrieve information from Mcp 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 Mcp: ```json { "version": "1", "default": "deny", "tools": { "watchers.weather-alert": {} } } ``` ## Other tools on Mcp (571) - `queue.ack` — Destructive — https://policylayer.com/tools/io-github-2s-io-mcp/queue.ack.md - `store.blob-delete` — Destructive — https://policylayer.com/tools/io-github-2s-io-mcp/store.blob-delete.md - `store.doc-delete` — Destructive — https://policylayer.com/tools/io-github-2s-io-mcp/store.doc-delete.md - `store.kv-delete` — Destructive — https://policylayer.com/tools/io-github-2s-io-mcp/store.kv-delete.md - `store.vector-delete` — Destructive — https://policylayer.com/tools/io-github-2s-io-mcp/store.vector-delete.md - `watchers.cancel` — Destructive — https://policylayer.com/tools/io-github-2s-io-mcp/watchers.cancel.md - `ai.council` — Execute — https://policylayer.com/tools/io-github-2s-io-mcp/ai.council.md - `ai.screenshot` — Execute — https://policylayer.com/tools/io-github-2s-io-mcp/ai.screenshot.md - `batch.run` — Execute — https://policylayer.com/tools/io-github-2s-io-mcp/batch.run.md - `dev.preflight` — Execute — https://policylayer.com/tools/io-github-2s-io-mcp/dev.preflight.md - `dev.regex-test` — Execute — https://policylayer.com/tools/io-github-2s-io-mcp/dev.regex-test.md - `hash.compute` — Execute — https://policylayer.com/tools/io-github-2s-io-mcp/hash.compute.md - `pubsub.subscribe` — Execute — https://policylayer.com/tools/io-github-2s-io-mcp/pubsub.subscribe.md - `queue.lease` — Execute — https://policylayer.com/tools/io-github-2s-io-mcp/queue.lease.md - `search.crawl` — Execute — https://policylayer.com/tools/io-github-2s-io-mcp/search.crawl.md - `url.render` — Execute — https://policylayer.com/tools/io-github-2s-io-mcp/url.render.md - `watchers.crypto-address-activity` — Execute — https://policylayer.com/tools/io-github-2s-io-mcp/watchers.crypto-address-activity.md - `watchers.earthquake` — Execute — https://policylayer.com/tools/io-github-2s-io-mcp/watchers.earthquake.md - `predict.crypto-updown` — Financial — https://policylayer.com/tools/io-github-2s-io-mcp/predict.crypto-updown.md - `predict.wallet` — Financial — https://policylayer.com/tools/io-github-2s-io-mcp/predict.wallet.md - `watchers.fear-greed` — Financial — https://policylayer.com/tools/io-github-2s-io-mcp/watchers.fear-greed.md - `watchers.fx-rate` — Financial — https://policylayer.com/tools/io-github-2s-io-mcp/watchers.fx-rate.md - `agent.knowledge-delta` — Other — https://policylayer.com/tools/io-github-2s-io-mcp/agent.knowledge-delta.md - `agriculture.drought` — Read — https://policylayer.com/tools/io-github-2s-io-mcp/agriculture.drought.md - `agriculture.stats` — Read — https://policylayer.com/tools/io-github-2s-io-mcp/agriculture.stats.md - `ai.chat` — Read — https://policylayer.com/tools/io-github-2s-io-mcp/ai.chat.md - `ai.classify` — Read — https://policylayer.com/tools/io-github-2s-io-mcp/ai.classify.md - `ai.describe-image` — Read — https://policylayer.com/tools/io-github-2s-io-mcp/ai.describe-image.md - `ai.entities` — Read — https://policylayer.com/tools/io-github-2s-io-mcp/ai.entities.md - `ai.extract` — Read — https://policylayer.com/tools/io-github-2s-io-mcp/ai.extract.md - …and 541 more: https://policylayer.com/tools/io-github-2s-io-mcp.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-2s-io-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-2s-io-mcp