AI agents use strato.rewards.claim to commit financial operations through Griphook — usually the final step of a payment, billing, or trading workflow. A call moves real money.
Claiming rewards on a DeFi protocol triggers a blockchain transaction that transfers CATA tokens to the caller's wallet. This is a financial operation with real monetary value. Misuse could result in unauthorized claiming of rewards or interaction with malicious contracts. Severity is high due to the financial value of tokens and irreversible nature of blockchain transactions.
From the tool's definition "Claim all pending CATA rewards from RewardsChef" — initiates a financial transaction that moves/claims token rewards on a DeFi blockchain platform
Attacks that exploit this kind of access
Claim all pending CATA rewards from RewardsChef. It is categorised as a Financial tool in the Griphook MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Griphook MCP server in PolicyLayer and add a rule for strato.rewards.claim: 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 Griphook. Nothing to install.
strato.rewards.claim is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the strato.rewards.claim 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 strato.rewards.claim. 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.
strato.rewards.claim is provided by the Griphook MCP server (strato-net/strato-griphook). 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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