# lookupUsers

use this tool to list users

Agent View of the PolicyLayer registry record for `lookupUsers`. HTML page: https://policylayer.com/tools/firebase-genkit/lookupusers

## Facts

- Tool: `lookupUsers`
- Server: Genkit MCP (`genkit-ai/genkit`) — https://policylayer.com/tools/firebase-genkit.md
- Homepage: https://github.com/genkit-ai/genkit
- 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": "lookupUsers",
    "arguments": {}
  }
}
```

## Why lookupUsers is rated Low

This tool retrieves user information without modifying, deleting, or executing external operations. The verb 'list' and the query nature of the operation place it squarely in the Read category. The severity is low as unauthorized access to a user list is typically less critical than destructive or financial operations, though context-dependent sensitivity of user data could elevate this in specific environments.

From the tool's own definition: "Tool name 'lookupUsers' and description 'use this tool to list users' indicates a query/retrieval operation with no modification."

## Use case

AI agents call lookupUsers to retrieve information from Genkit 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 Genkit MCP:

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

## Other tools on Genkit MCP (71)

- `removeTask` — Destructive — https://policylayer.com/tools/firebase-genkit/removetask.md
- `characterGenerator` — Execute — https://policylayer.com/tools/firebase-genkit/charactergenerator.md
- `delegate_to_coder` — Execute — https://policylayer.com/tools/firebase-genkit/delegate-to-coder.md
- `delegate_to_researcher` — Execute — https://policylayer.com/tools/firebase-genkit/delegate-to-researcher.md
- `run_flow` — Execute — https://policylayer.com/tools/firebase-genkit/run-flow.md
- `run_shell` — Execute — https://policylayer.com/tools/firebase-genkit/run-shell.md
- `screenshot` — Execute — https://policylayer.com/tools/firebase-genkit/screenshot.md
- `slowWork` — Execute — https://policylayer.com/tools/firebase-genkit/slowwork.md
- `start_runtime` — Execute — https://policylayer.com/tools/firebase-genkit/start-runtime.md
- `transferToAgent` — Execute — https://policylayer.com/tools/firebase-genkit/transfertoagent.md
- `use_skill` — Execute — https://policylayer.com/tools/firebase-genkit/use-skill.md
- `processPayment` — Financial — https://policylayer.com/tools/firebase-genkit/processpayment.md
- `request_transfer` — Financial — https://policylayer.com/tools/firebase-genkit/request-transfer.md
- `reservationTool` — Financial — https://policylayer.com/tools/firebase-genkit/reservationtool.md
- `transferMoney` — Financial — https://policylayer.com/tools/firebase-genkit/transfermoney.md
- `add` — Other — https://policylayer.com/tools/firebase-genkit/add.md
- `askQuestion` — Other — https://policylayer.com/tools/firebase-genkit/askquestion.md
- `datePicker` — Other — https://policylayer.com/tools/firebase-genkit/datepicker.md
- `error_tool` — Other — https://policylayer.com/tools/firebase-genkit/error-tool.md
- `exitTool` — Other — https://policylayer.com/tools/firebase-genkit/exittool.md
- `gablorken` — Other — https://policylayer.com/tools/firebase-genkit/gablorken.md
- `test_http` — Other — https://policylayer.com/tools/firebase-genkit/test-http.md
- `account_record` — Read — https://policylayer.com/tools/firebase-genkit/account-record.md
- `ask_user` — Read — https://policylayer.com/tools/firebase-genkit/ask-user.md
- `celsiusToFahrenheit` — Read — https://policylayer.com/tools/firebase-genkit/celsiustofahrenheit.md
- `confirmBooking` — Read — https://policylayer.com/tools/firebase-genkit/confirmbooking.md
- `current_weather` — Read — https://policylayer.com/tools/firebase-genkit/current-weather.md
- `dailySpecial` — Read — https://policylayer.com/tools/firebase-genkit/dailyspecial.md
- `dynamicGablorkenTool` — Read — https://policylayer.com/tools/firebase-genkit/dynamicgablorkentool.md
- `echo_meta_tool` — Read — https://policylayer.com/tools/firebase-genkit/echo-meta-tool.md
- …and 41 more: https://policylayer.com/tools/firebase-genkit.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=firebase-genkit · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/firebase-genkit