Create a new QR code. Authenticated users (API key required) get a permanent short URL that can be retargeted at any time without reprinting the physical QR image — limits are set by the account plan. Anonymous users receive a one-time data URI image that is not stored and cannot be updated. On s...
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AI agents use create_qr_code to create or modify resources in QrVerloz. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call create_qr_code repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach QrVerloz.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"create_qr_code": {
"limits": [
{
"counter": "create_qr_code_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full QrVerloz policy for all 8 tools.
These attack patterns abuse exactly the kind of access create_qr_code gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Create a new QR code. Authenticated users (API key required) get a permanent short URL that can be retargeted at any time without reprinting the physical QR image — limits are set by the account plan. Anonymous users receive a one-time data URI image that is not stored and cannot be updated. On success the result is a pre-formatted markdown table — display it exactly as received, do not reformat or summarise.. It is categorised as a Write tool in the QrVerloz MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the QrVerloz MCP server in PolicyLayer and add a rule for create_qr_code: 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 QrVerloz. Nothing to install.
create_qr_code is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the create_qr_code 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.
Set action: deny in the PolicyLayer policy for create_qr_code. 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.
create_qr_code is provided by the QrVerloz MCP server (https://qrverloz.com/api/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 8 QrVerloz tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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