Fetch Commander Spellbook card by numeric ID.
AI agents call csb_card 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 fetches card data by ID, which is a straightforward read operation that queries existing data without creating, modifying, deleting, or executing anything. The word 'Fetch' confirms retrieval-only semantics. Blast radius is minimal as misuse would only retrieve data that is already public.
From the tool's definition Tool name 'csb_card' and description 'Fetch Commander Spellbook card by numeric ID' indicate a retrieval operation with no side effects.
Attacks that exploit this kind of access
Fetch Commander Spellbook card by numeric ID. 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 csb_card: 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.
csb_card 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 csb_card 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 csb_card. 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.
csb_card 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.
Teams ship this data inside their own products. See what a licence covers →