List all sets available on Scryfall.
AI agents call list_sets 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 queries and returns a static list of Magic: The Gathering card sets from the Scryfall API. It performs no data creation, modification, deletion, code execution, or financial operations. The blast radius of misuse is minimal—an AI agent calling this repeatedly could cause minor API rate-limiting but poses no security risk to data or systems.
From the tool's definition Tool name 'list_sets' and description 'List all sets available on Scryfall' indicate a retrieval operation with no mutation or side effects.
Attacks that exploit this kind of access
List all sets available on Scryfall. 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 list_sets: 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.
list_sets 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 list_sets 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 list_sets. 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.
list_sets is provided by the Scryfall MCP Server MCP server (latte-chan/scryfall-connector). 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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