Add earned points to a loyalty card
AI agents use loyaltycard_earn_points to create or update resources in MCP Dynamics 365 Commerce Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your MCP Dynamics 365 Commerce Server environment.
This tool modifies existing customer loyalty data reversibly. Points can theoretically be adjusted, reversed, or corrected later, making it a Write operation rather than Destructive.
From the tool's definition Tool name is 'loyaltycard_earn_points' and description states 'Add earned points to a loyalty card', which modifies loyalty card data by adding/incrementing points balance.
Attacks that exploit this kind of access
Add earned points to a loyalty card. It is categorised as a Write tool in the MCP Dynamics 365 Commerce Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the MCP Dynamics 365 Commerce Server MCP server in PolicyLayer and add a rule for loyaltycard_earn_points: 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 MCP Dynamics 365 Commerce Server. Nothing to install.
loyaltycard_earn_points 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 loyaltycard_earn_points 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 loyaltycard_earn_points. 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.
loyaltycard_earn_points is provided by the MCP Dynamics 365 Commerce Server MCP server (jiantmo/mcp-commerce). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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