AI agents call tcg.games to retrieve information from Mcp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns reference data about available trading card games and their identifiers. It performs a simple lookup operation with no capability to modify data, execute arbitrary operations, or cause financial transactions. The read-only nature and limited scope make it low severity even in the context of a pay-per-call service.
From the tool's definition Tool description states 'List all trading-card games/categories' — a retrieval operation with no modification or side effects.
Attacks that exploit this kind of access
List all trading-card games/categories (Magic, Pokemon, Yu-Gi-Oh, Lorcana, etc.) with their ids. It is categorised as a Read tool in the Mcp MCP Server, which means it retrieves data without modifying state.
Register the MCP server in PolicyLayer and add a rule for tcg.games: 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. Nothing to install.
tcg.games 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 tcg.games 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 tcg.games. 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.
tcg.games is provided by the MCP server (@2sio/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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