Get win rate and draft performance data for cards in a set. Key metrics: GIH WR (ever_drawn_win_rate), ALSA (avg_seen), OH WR (opening_hand_win_rate), IWD (drawn_improvement_win_rate). Note: 17Lands data skews toward above-average players (~56% baseline WR). Cards with <500 games may not have rel...
Part of the MTG MCP Server server.
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AI agents use draft_card_ratings to create or modify resources in MTG MCP Server. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call draft_card_ratings repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach MTG MCP Server.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"draft_card_ratings": {
"limits": [
{
"counter": "draft_card_ratings_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full MTG MCP Server policy for all 69 tools.
These attack patterns abuse exactly the kind of access draft_card_ratings gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Get win rate and draft performance data for cards in a set. Key metrics: GIH WR (ever_drawn_win_rate), ALSA (avg_seen), OH WR (opening_hand_win_rate), IWD (drawn_improvement_win_rate). Note: 17Lands data skews toward above-average players (~56% baseline WR). Cards with <500 games may not have reliable data.. It is categorised as a Write tool in the MTG MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the MTG MCP Server MCP server in PolicyLayer and add a rule for draft_card_ratings: 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.
draft_card_ratings is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the draft_card_ratings 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 draft_card_ratings. 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.
draft_card_ratings 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.
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