AI agents call mtg-rules-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.
The tool's name strongly suggests fetching/retrieving Magic: The Gathering rules data without modification. The 'get' suffix is a standard convention for read operations. Despite missing description, the context of the server (providing AI assistants with MTG information) and pattern matching with similar sibling tools (other '-get' and '-search' tools) indicates this is a data retrieval tool with no side effects.
From the tool's definition Tool name 'mtg-rules-get' with 'get' suffix indicates data retrieval. No description provided, but naming convention and sibling tools (mtg-cardtypes-get, mtg-context-get, mtg-combos-search) all perform read-only queries of Magic: The Gathering information.
Attacks that exploit this kind of access
mtg-rules-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-rules-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-rules-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-rules-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-rules-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-rules-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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