AI agents call get_card_image to retrieve information from Ygocdb without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool queries and returns image data for Yu-Gi-Oh! cards based on their ID. It is purely retrieving existing data without creating, modifying, deleting, or executing any operations. The blast radius of misuse is minimal—worst case is returning images for unintended cards, which poses no security risk.
From the tool's definition Tool retrieves card images by ID ("通过卡牌ID获取游戏王卡牌的图片" = "get game card images by card ID"). This is a read-only retrieval operation with no side effects, modifications, or destructive capabilities.
Attacks that exploit this kind of access
通过卡牌ID获取游戏王卡牌的图片. It is categorised as a Read tool in the Ygocdb MCP Server, which means it retrieves data without modifying state.
Register the Ygocdb MCP server in PolicyLayer and add a rule for get_card_image: 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 Ygocdb. Nothing to install.
get_card_image is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_card_image 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 get_card_image. 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.
get_card_image is provided by the Ygocdb MCP server (lieyanqzu/ygocdb-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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