Find recently printed or released Magic cards. Searches Scryfall for cards released within the given number of days. Optionally filter by set or format legality.
Part of the MTG MCP Server server.
Free to start. No card required.
AI agents invoke scryfall_whats_new to trigger processes or run actions in MTG MCP Server. Execute operations can have side effects beyond the immediate call -- triggering builds, sending notifications, or starting workflows. Rate limits and argument validation are essential to prevent runaway execution.
scryfall_whats_new can trigger processes with real-world consequences. An uncontrolled agent might start dozens of builds, send mass notifications, or kick off expensive compute jobs. PolicyLayer enforces rate limits and validates arguments to keep execution within safe bounds.
Execute tools trigger processes. Rate-limit and validate arguments to prevent unintended side effects.
{
"version": "1",
"default": "deny",
"tools": {
"scryfall_whats_new": {
"limits": [
{
"counter": "scryfall_whats_new_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}See the full MTG MCP Server policy for all 69 tools.
These attack patterns abuse exactly the kind of access scryfall_whats_new gives an agent. Each links to the full case and the policy that stops it:
Other execute tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Find recently printed or released Magic cards. Searches Scryfall for cards released within the given number of days. Optionally filter by set or format legality.. It is categorised as a Execute tool in the MTG MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the MTG MCP Server MCP server in PolicyLayer and add a rule for scryfall_whats_new: 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 Server. Nothing to install.
scryfall_whats_new is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the scryfall_whats_new 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 scryfall_whats_new. 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.
scryfall_whats_new is provided by the MTG MCP Server MCP server (pypi:mtg-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 69 MTG MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.