Compute the Merkle root for a set of CryptoPunk IDs. The root matches the on-chain Solady MerkleProofLib encoding used by the Stash contract. Rate limit: 5 per 10 min (compute bucket — shared with filter_punks, resolve_merkle_root).
Risk signalsAdmin/system-level operation
Part of the Lightyear CryptoPunks server.
Free to start. No card required.
AI agents use compute_merkle_root to create or modify resources in Lightyear CryptoPunks. 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 compute_merkle_root 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 Lightyear CryptoPunks.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"compute_merkle_root": {
"limits": [
{
"counter": "compute_merkle_root_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Lightyear CryptoPunks policy for all 11 tools.
These attack patterns abuse exactly the kind of access compute_merkle_root 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.
Compute the Merkle root for a set of CryptoPunk IDs. The root matches the on-chain Solady MerkleProofLib encoding used by the Stash contract. Rate limit: 5 per 10 min (compute bucket — shared with filter_punks, resolve_merkle_root).. It is categorised as a Write tool in the Lightyear CryptoPunks MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Lightyear CryptoPunks MCP server in PolicyLayer and add a rule for compute_merkle_root: 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 Lightyear CryptoPunks. Nothing to install.
compute_merkle_root 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 compute_merkle_root 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 compute_merkle_root. 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.
compute_merkle_root is provided by the Lightyear CryptoPunks MCP server (https://punks.lightyear.build/api/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 11 Lightyear CryptoPunks tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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