create_sms_qr · QR for Agent MCP: Risk & Policy

WHAT IT DOES

What create_sms_qr does on QR for Agent

AI agents use create_sms_qr to create or update resources in QR for Agent — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your QR for Agent environment.

PARAMETERS

Parameter	Type	Required	Description
`label`	string	—	Label for this QR code.
`format`	string	—	Image format.
`message`	string	—	Pre-filled SMS message text.
`logo_url`	string	—	Logo URL or data URI.
`dot_style`	string	—	Dot shape.
`frame_text`	string	—	CTA text on frame (max 30 chars).
`frame_color`	string	—	Frame background color.
`frame_style`	string	—	Frame style around QR.
`corner_style`	string	—	Corner shape.
`phone_number`	string	Yes	Phone number to send SMS to.
`background_color`	string	—	Hex color for background.
`foreground_color`	string	—	Hex color for dots.

Parameters from the server's own tool schema.

WHY IT NEEDS A POLICY

Why create_sms_qr needs a policy

This tool creates a new QR code resource that can be scanned to initiate an SMS. It is a reversible write operation (the QR code can be deleted or replaced). While it facilitates SMS composition, the tool itself does not send messages or execute external operations—it only creates metadata/artifacts. No financial transactions, destructive deletions, or code execution occur.

From the tool's definition Tool name 'create_sms_qr' and description 'Create a QR code...' indicate data creation. The tool generates and stores a new QR code artifact with embedded SMS parameters (phone number and message text).

Risk signalsHigh parameter count (13 properties)

Attacks that exploit this kind of access

Questions about create_sms_qr

What does the create_sms_qr tool do? +

Create a QR code that opens a pre-filled SMS message when scanned. Set the phone number and optional message text. It is categorised as a Write tool in the QR for Agent MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does create_sms_qr accept? +

create_sms_qr accepts 12 parameters: label, format, message, logo_url, dot_style, frame_text, frame_color, frame_style, corner_style, phone_number, background_color, foreground_color. Required: phone_number. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on create_sms_qr? +

Register the QR for Agent MCP server in PolicyLayer and add a rule for create_sms_qr: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches QR for Agent. Nothing to install.

What risk level is create_sms_qr? +

create_sms_qr is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit create_sms_qr? +

Yes. Add a rate_limit block to the create_sms_qr rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block create_sms_qr completely? +

Set action: deny in the PolicyLayer policy for create_sms_qr. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides create_sms_qr? +

create_sms_qr is provided by the QR for Agent MCP server (qr-for-agent). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.