Get balances for multiple tokens at once
AI agents call get-multiple-balances to retrieve information from Monad 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 token balance data from the Monad testnet without creating, modifying, or deleting any state. It is a read-only query operation with no side effects. The low severity reflects minimal blast radius—an AI agent misusing this tool can only retrieve information that is already public on the blockchain.
From the tool's definition Tool name 'get-multiple-balances' and description 'Get balances for multiple tokens at once' indicate a retrieval operation.
Attacks that exploit this kind of access
Get balances for multiple tokens at once. It is categorised as a Read tool in the Monad MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Monad MCP Server MCP server in PolicyLayer and add a rule for get-multiple-balances: 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 Monad MCP Server. Nothing to install.
get-multiple-balances 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 get-multiple-balances 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 get-multiple-balances. 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.
get-multiple-balances is provided by the Monad MCP Server MCP server (semutireng22/mcp-monad). 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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