STEP 2: Check if withdrawal is ready to claim on Ethereum. Use blockNumber from bridge_to_ethereum response.
AI agents call check_withdrawal_status to retrieve information from Sonic Blockchain MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves withdrawal status information from the blockchain. It is a read-only query operation that does not execute transactions, modify data, delete data, or move funds. The verb 'check' and the context of checking readiness before claiming indicates a pure information retrieval function.
From the tool's definition Tool name 'check_withdrawal_status' and description 'Check if withdrawal is ready to claim' indicate a query/status check operation with no side effects. The description explicitly states it checks/verifies a state without modifying it.
Attacks that exploit this kind of access
STEP 2: Check if withdrawal is ready to claim on Ethereum. Use blockNumber from bridge_to_ethereum response. It is categorised as a Read tool in the Sonic Blockchain MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Sonic Blockchain MCP Server MCP server in PolicyLayer and add a rule for check_withdrawal_status: 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 Sonic Blockchain MCP Server. Nothing to install.
check_withdrawal_status is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the check_withdrawal_status 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 check_withdrawal_status. 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.
check_withdrawal_status is provided by the Sonic Blockchain MCP Server MCP server (tairon-ai/sonic-mcp). 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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