Search for Magic: The Gathering cards by name, type, or other criteria
AI agents call search_cards to retrieve information from Scryfall MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs database queries to retrieve card information without modifying, deleting, or executing any external operations. It is a straightforward Read operation with minimal risk, as it only returns data from a public Magic: The Gathering card database.
From the tool's definition Tool description states 'Search for Magic: The Gathering cards' and sibling tools include 'get_card_details', 'get_random_card', 'get_set_info'—all retrieval operations.
Attacks that exploit this kind of access
Search for Magic: The Gathering cards by name, type, or other criteria. It is categorised as a Read tool in the Scryfall MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Scryfall MCP Server MCP server in PolicyLayer and add a rule for search_cards: 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 Scryfall MCP Server. Nothing to install.
search_cards 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 search_cards 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 search_cards. 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.
search_cards is provided by the Scryfall MCP Server MCP server (joemocode/scryfall-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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