9 tools. 3 can modify or destroy data without limits.
2 destructive tools with no built-in limits. Policy required.
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Financial operations (deposit_usdc, withdraw_usdc) can move real money. An agent caught in a loop could drain accounts before anyone notices.
Write operations (generate_paint_intent) modify state. Without rate limits, an agent can make hundreds of changes in seconds — faster than any human can review or revert.
Intercept sits between your agent and Agent Canvas Arena. Every tool call checked against your policy before it executes — so your agent can do its job without breaking things.
npx -y @policylayer/intercept scan -- npx -y @fcfrasca/agent-canvas-arena deposit_usdc:
rules:
- action: deny Financial tools should be explicitly enabled per use case, not open by default.
generate_paint_intent:
rules:
- rate_limit: 30/hour Prevents bulk unintended modifications from agents caught in loops.
claim_reward:
rules:
- rate_limit: 60/minute Controls API costs and prevents retry loops from exhausting upstream rate limits.
Yes. The Agent Canvas Arena server exposes 2 financial tools including deposit_usdc, withdraw_usdc. Without a policy, an autonomous agent can call these with no spend caps, no rate limits, and no approval flow. Intercept lets you block financial tools by default or set per-tool rate limits.
The Agent Canvas Arena server has 1 write tools including generate_paint_intent. Set rate limits in your policy file -- for example, rate_limit: 10/hour prevents an agent from making more than 10 modifications per hour. Intercept enforces this at the transport layer.
9 tools across 3 categories: Financial, Read, Write. 6 are read-only. 3 can modify, create, or delete data.
One line change. Instead of running the Agent Canvas Arena server directly, prefix it with Intercept: intercept -c fcfrasca-agent-canvas-arena.yaml -- npx -y @fcfrasca/agent-canvas-arena. Download a pre-built policy from policylayer.com/policies/fcfrasca-agent-canvas-arena and adjust the limits to match your use case.
Starter policies available for each. Same risk classification, same one-command setup.
Set budgets, approvals, and hard limits across MCP servers.
npx -y @policylayer/intercept init