update_social_qr · QR for Agent MCP: Risk & Policy

WHAT IT DOES

What update_social_qr does on QR for Agent

AI agents use update_social_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	—	Update the label.
`github`	string	—	GitHub URL.
`tiktok`	string	—	TikTok URL.
`twitter`	string	—	Twitter/X URL.
`website`	string	—	Website URL.
`youtube`	string	—	YouTube URL.
`facebook`	string	—	Facebook URL.
`linkedin`	string	—	LinkedIn URL.
`short_id`	string	Yes	The short ID of the Social QR code to update.
`instagram`	string	—	Instagram URL.

Parameters from the server's own tool schema.

WHY IT NEEDS A POLICY

Why update_social_qr needs a policy

This tool modifies existing QR code data reversibly by updating social media links. It is a Write operation because it alters stored data without deleting it, and changes can be undone by further updates. The impact is low severity because QR codes are typically non-critical metadata with limited blast radius if misused by an agent.

From the tool's definition Tool name contains 'update' and description states 'Update the social media links'; 'Partial updates merge with existing data' confirms modification rather than creation or deletion.

Risk signalsHigh parameter count (10 properties)

Attacks that exploit this kind of access

Questions about update_social_qr

What does the update_social_qr tool do? +

Update the social media links of a Social QR code. Partial updates merge with existing data. 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 update_social_qr accept? +

update_social_qr accepts 10 parameters: label, github, tiktok, twitter, website, youtube, facebook, linkedin, short_id, instagram. Required: short_id. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on update_social_qr? +

Register the QR for Agent MCP server in PolicyLayer and add a rule for update_social_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 update_social_qr? +

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

Can I rate-limit update_social_qr? +

Yes. Add a rate_limit block to the update_social_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 update_social_qr completely? +

Set action: deny in the PolicyLayer policy for update_social_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 update_social_qr? +

update_social_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.