tcg.set-prices · MCP: Risk & Policy

WHAT IT DOES

What tcg.set-prices does on Mcp

AI agents call tcg.set-prices 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.

WHY IT NEEDS A POLICY

Why tcg.set-prices needs a policy

This tool retrieves current price information for trading card game sets. It performs a read-only lookup of market, low, mid, and high prices derived from TCGplayer. No data is created, modified, or deleted.

From the tool's definition 'All cards in a set with current market/low/mid/high prices' — retrieves pricing data; 'TCGplayer-derived' indicates it queries/fetches existing market data

Attacks that exploit this kind of access

Questions about tcg.set-prices

What does the tcg.set-prices tool do? +

All cards in a set with current market/low/mid/high prices (TCGplayer-derived). Pass game + set (groupId). It is categorised as a Read tool in the Mcp MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on tcg.set-prices? +

Register the MCP server in PolicyLayer and add a rule for tcg.set-prices: 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.

What risk level is tcg.set-prices? +

tcg.set-prices is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit tcg.set-prices? +

Yes. Add a rate_limit block to the tcg.set-prices 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.

How do I block tcg.set-prices completely? +

Set action: deny in the PolicyLayer policy for tcg.set-prices. 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.

What MCP server provides tcg.set-prices? +

tcg.set-prices 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.