# health_signal

Health intelligence with NIH RxNorm drug interaction checking + FDA data. Drug labels, adverse events, recalls, nutrition, drug-to-drug interactions with severity ratings. 7 sources risk scored 0-100. Price: $0.10 USDC on Base.

Agent View of the PolicyLayer registry record for `health_signal`. HTML page: https://policylayer.com/tools/8randonpickart5-alderpost-mcp/health-signal

## Facts

- Tool: `health_signal`
- Server: Alderpost (`8randonpickart5/alderpost-mcp`) — https://policylayer.com/tools/8randonpickart5-alderpost-mcp.md
- Homepage: https://github.com/8randonpickart5/alderpost-mcp
- Risk category: Read (Low risk)
- Registry record: grade B, 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": "health_signal",
    "arguments": {}
  }
}
```

## Why health_signal is rated Low

This tool aggregates and queries health data from NIH RxNorm and FDA sources. It returns scored intelligence responses without modifying any underlying data, executing code, or triggering irreversible actions. While the MCP server charges per call, the tool itself only reads and reports data. The primary function is informational lookup, which is characteristic of Read category tools.

From the tool's own definition: "Tool performs health intelligence queries including 'drug labels, adverse events, recalls, nutrition, drug-to-drug interactions' — all retrieval/lookup operations. No modification, deletion, or execution of external systems."

## Use case

AI agents call health_signal to retrieve information from Alderpost 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 Alderpost:

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

## Other tools on Alderpost (7)

- `sports_edge` — Financial — https://policylayer.com/tools/8randonpickart5-alderpost-mcp/sports-edge.md
- `threat_pulse` — Financial — https://policylayer.com/tools/8randonpickart5-alderpost-mcp/threat-pulse.md
- `company_xray` — Read — https://policylayer.com/tools/8randonpickart5-alderpost-mcp/company-xray.md
- `compliance_check` — Read — https://policylayer.com/tools/8randonpickart5-alderpost-mcp/compliance-check.md
- `domain_shield` — Read — https://policylayer.com/tools/8randonpickart5-alderpost-mcp/domain-shield.md
- `property_intel` — Read — https://policylayer.com/tools/8randonpickart5-alderpost-mcp/property-intel.md
- `prospect_iq` — Read — https://policylayer.com/tools/8randonpickart5-alderpost-mcp/prospect-iq.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=8randonpickart5-alderpost-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/8randonpickart5-alderpost-mcp