AI agents call mtg-cardtypes-get to retrieve information from MTG-MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool almost certainly retrieves card type information from a Magic: The Gathering database. The '-get' suffix and the server's read-focused design (providing card data, rules, recommendations) indicate a query/retrieval operation with no side effects.
From the tool's definition Tool name 'mtg-cardtypes-get' contains 'get', a standard retrieval operation. Sibling tools on the server include 'mtg-rules-get', 'mtg-context-get', and 'mtg-moxfield-fetch', which are all data retrieval functions.
Attacks that exploit this kind of access
mtg-cardtypes-get. It is categorised as a Read tool in the MTG-MCP MCP Server, which means it retrieves data without modifying state.
Register the MTG- MCP server in PolicyLayer and add a rule for mtg-cardtypes-get: 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 MTG-MCP. Nothing to install.
mtg-cardtypes-get 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 mtg-cardtypes-get 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 mtg-cardtypes-get. 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.
mtg-cardtypes-get is provided by the MTG- MCP server (wtfregia/mtg-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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