AI agents call tool_fetch_archidekt_deck 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 performs a read-only operation that queries and retrieves deck information from an external source (Archidekt) based on a provided URL. No side effects, modifications, or irreversible actions are possible. The operation is purely informational retrieval.
From the tool's definition Tool name contains 'fetch' and description states 'Fetch a deck from Archidekt using a deck URL' — retrieves existing deck data with no modification or deletion capability.
Attacks that exploit this kind of access
Fetch a deck from Archidekt using a deck URL. 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 tool_fetch_archidekt_deck: 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.
tool_fetch_archidekt_deck 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 tool_fetch_archidekt_deck 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 tool_fetch_archidekt_deck. 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.
tool_fetch_archidekt_deck 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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