credit_gift_card
Add credit to a gift card. Creates a credit transaction that increases the gift card balance.
This record as markdown: /tools/uvu-store-shopify-graphql-mcp/credit-gift-card.md
What credit_gift_card does on Shopify Graphql
AI agents use credit_gift_card to create or update resources in Shopify Graphql, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Shopify Graphql environment.
Why credit_gift_card is rated Medium
This tool modifies financial balances by adding credit to a gift card, which is a Write operation that increases store liability. While it involves money/value, it doesn't directly move funds or commit financial obligations externally — it adjusts an internal store credit balance. However, misuse could allow unauthorized credit to be issued at scale, making the blast radius high.
From the tool's definition Add credit to a gift card. Creates a credit transaction that increases the gift card balance.
Attacks that exploit this kind of access
The rule that runs credit_gift_card safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Shopify Graphql, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For credit_gift_card, this is the rule to start with:
credit_gift_card stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Shopify Graphql, apply this rule, and every credit_gift_card call is checked against it from then on.
Questions about credit_gift_card
Add credit to a gift card. Creates a credit transaction that increases the gift card balance. It is categorised as a Write tool in the Shopify Graphql MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Shopify Graphql MCP server in PolicyLayer and add a rule for credit_gift_card: 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 Shopify Graphql. Nothing to install.
credit_gift_card 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 credit_gift_card 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 credit_gift_card. 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.
credit_gift_card is provided by the Shopify Graphql MCP server (uvu-store/shopify-graphql-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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