# sms_list_inbox

A read tool on the Twilio SMS MCP Server MCP server.

Agent View of the PolicyLayer registry record for `sms_list_inbox`. HTML page: https://policylayer.com/tools/0x-professor-twilio-mcp-server/sms-list-inbox

## Facts

- Tool: `sms_list_inbox`
- Server: Twilio SMS MCP Server (`0x-professor/twilio-mcp-server`) — https://policylayer.com/tools/0x-professor-twilio-mcp-server.md
- Homepage: https://github.com/0x-Professor/Twilio-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": "sms_list_inbox",
    "arguments": {}
  }
}
```

## Why sms_list_inbox is rated Low

The tool retrieves or lists SMS/MMS messages from an inbox without modifying or deleting them, placing it in the Read category. Severity is medium because inbox contents may contain sensitive personal or business information (phone numbers, message contents, metadata), and unauthorized access or exfiltration via an AI agent could impact privacy.

From the tool's own definition: "Tool name 'sms_list_inbox' indicates retrieval of messages from an inbox; server description mentions 'real-time inbox monitoring' as a Read operation. No description provided for the specific tool."

## Use case

AI agents call sms_list_inbox to retrieve information from Twilio SMS 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 Twilio SMS MCP Server:

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

## Other tools on Twilio SMS MCP Server (15)

- `sms_cancel_scheduled` — Destructive — https://policylayer.com/tools/0x-professor-twilio-mcp-server/sms-cancel-scheduled.md
- `sms_delete_message` — Destructive — https://policylayer.com/tools/0x-professor-twilio-mcp-server/sms-delete-message.md
- `sms_account_info` — Read — https://policylayer.com/tools/0x-professor-twilio-mcp-server/sms-account-info.md
- `sms_format_number` — Read — https://policylayer.com/tools/0x-professor-twilio-mcp-server/sms-format-number.md
- `sms_get_conversation` — Read — https://policylayer.com/tools/0x-professor-twilio-mcp-server/sms-get-conversation.md
- `sms_get_message` — Read — https://policylayer.com/tools/0x-professor-twilio-mcp-server/sms-get-message.md
- `sms_list_numbers` — Read — https://policylayer.com/tools/0x-professor-twilio-mcp-server/sms-list-numbers.md
- `sms_list_sent` — Read — https://policylayer.com/tools/0x-professor-twilio-mcp-server/sms-list-sent.md
- `sms_lookup_number` — Read — https://policylayer.com/tools/0x-professor-twilio-mcp-server/sms-lookup-number.md
- `sms_redact_message` — Read — https://policylayer.com/tools/0x-professor-twilio-mcp-server/sms-redact-message.md
- `sms_usage_stats` — Read — https://policylayer.com/tools/0x-professor-twilio-mcp-server/sms-usage-stats.md
- `sms_mark_read` — Write — https://policylayer.com/tools/0x-professor-twilio-mcp-server/sms-mark-read.md
- `sms_schedule` — Write — https://policylayer.com/tools/0x-professor-twilio-mcp-server/sms-schedule.md
- `sms_send` — Write — https://policylayer.com/tools/0x-professor-twilio-mcp-server/sms-send.md
- `sms_send_bulk` — Write — https://policylayer.com/tools/0x-professor-twilio-mcp-server/sms-send-bulk.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=0x-professor-twilio-mcp-server · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/0x-professor-twilio-mcp-server