# get_signal_history

Return the detected SignalEvent rows for a single trigger — each event records whether the poll found changes, a summary, and the raw scrape. Returns {data: SignalEvent[]}.

Agent View of the PolicyLayer registry record for `get_signal_history`. HTML page: https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/get-signal-history

## Facts

- Tool: `get_signal_history`
- Server: Max MCP Server (`digital-crew-technologies/max-mcp-server`) — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server.md
- Homepage: https://github.com/Digital-Crew-Technologies/max-mcp-server
- 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": "get_signal_history",
    "arguments": {}
  }
}
```

## Why get_signal_history is rated Low

get_signal_history fetches and returns existing signal event records. There are no side effects, state modifications, code execution, data deletion, or financial implications. The tool merely queries and presents historical polling data to the user. This is a straightforward Read operation with low blast radius — misuse would only expose sensitive information contained in those events, not cause structural damage.

From the tool's own definition: "Tool description states 'Return the detected SignalEvent rows' — it retrieves historical signal event data without modifying, deleting, or executing external operations."

## Use case

AI agents call get_signal_history to retrieve information from Max 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 Max MCP Server:

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

## Other tools on Max MCP Server (414)

- `automation_cancel_run` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/automation-cancel-run.md
- `automation_delete` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/automation-delete.md
- `automation_discard_draft` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/automation-discard-draft.md
- `bulk_delete_organizations` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/bulk-delete-organizations.md
- `bulk_delete_prospects` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/bulk-delete-prospects.md
- `cancel_meeting` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/cancel-meeting.md
- `cancel_meeting_series` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/cancel-meeting-series.md
- `cancel_warmup` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/cancel-warmup.md
- `clear_failed_requests` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/clear-failed-requests.md
- `decline_meeting` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/decline-meeting.md
- `delete_calendar_event` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/delete-calendar-event.md
- `delete_campaign` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/delete-campaign.md
- `delete_campaign_attachment` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/delete-campaign-attachment.md
- `delete_deal` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/delete-deal.md
- `delete_deal_attachment` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/delete-deal-attachment.md
- `delete_deal_pipeline` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/delete-deal-pipeline.md
- `delete_deal_stage` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/delete-deal-stage.md
- `delete_deal_stage_rule` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/delete-deal-stage-rule.md
- `delete_icp` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/delete-icp.md
- `delete_meeting_link` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/delete-meeting-link.md
- `delete_organization` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/delete-organization.md
- `delete_prospect` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/delete-prospect.md
- `delete_prospect_list` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/delete-prospect-list.md
- `delete_prospect_profile_hook` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/delete-prospect-profile-hook.md
- `delete_saved_view` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/delete-saved-view.md
- `delete_schedule_preset` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/delete-schedule-preset.md
- `disconnect_data_supplier` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/disconnect-data-supplier.md
- `pipeline_delete_campaign_route` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/pipeline-delete-campaign-route.md
- `pipeline_delete_canvas_draft` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/pipeline-delete-canvas-draft.md
- `pipeline_delete_link` — Destructive — https://policylayer.com/tools/digital-crew-technologies-max-mcp-server/pipeline-delete-link.md
- …and 384 more: https://policylayer.com/tools/digital-crew-technologies-max-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=digital-crew-technologies-max-mcp-server · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/digital-crew-technologies-max-mcp-server