Get native ETH and ERC20 token balances for a wallet address. Reads directly from chain via RPC multicall. Use before write.account.add_liquidity or write.account.deposit to verify the wallet has sufficient tokens. Returns both raw balance (smallest unit/wei) and formatted (human-readable) per to...
Part of the Arcadia server.
Free to start. No card required.
AI agents use read.wallet.balances to create or modify resources in Arcadia. 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 read.wallet.balances 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 Arcadia.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"read.wallet.balances": {
"limits": [
{
"counter": "read.wallet.balances_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Arcadia policy for all 38 tools.
These attack patterns abuse exactly the kind of access read.wallet.balances 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.
Get native ETH and ERC20 token balances for a wallet address. Reads directly from chain via RPC multicall. Use before write.account.add_liquidity or write.account.deposit to verify the wallet has sufficient tokens. Returns both raw balance (smallest unit/wei) and formatted (human-readable) per token.. It is categorised as a Write tool in the Arcadia MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Arcadia MCP server in PolicyLayer and add a rule for read.wallet.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 Arcadia. Nothing to install.
read.wallet.balances 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 read.wallet.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 read.wallet.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.
read.wallet.balances is provided by the Arcadia MCP server (arcadia-finance/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 38 Arcadia tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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