AI agents call get_card_by_id 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.
This tool queries and retrieves card data from a Yu-Gi-Oh trading card database. It performs a read-only lookup operation: given a card ID, it returns card details. There is no modification, deletion, execution of code, or financial impact. The blast radius of misuse is minimal—an agent could retrieve unwanted card information, but this causes no harm to data or systems.
From the tool's definition Tool name 'get_card_by_id' and description '通过卡牌ID获取单张游戏王卡牌的详细信息' (retrieve detailed information of a single Yu-Gi-Oh card by card ID) indicate a retrieval operation with no side effects.
Attacks that exploit this kind of access
通过卡牌ID获取单张游戏王卡牌的详细信息. 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_by_id: 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_by_id 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_by_id 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_by_id. 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_by_id 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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