For a NEAR account, derive its addresses on every supported foreign chain and return all native-asset balances in one call. Errors on individual chains are reported per-chain — partial success is normal.
AI agents call hydra_account_balance_all_chains to retrieve information from Near Hydra without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only retrieves and returns balance information across chains. It derives addresses and reads balances without making any transactions, modifications, or executions. Pure read operation with no side effects.
From the tool's definition derive its addresses on every supported foreign chain and return all native-asset balances
Risk signalsBulk/mass operation — affects multiple targets
Documented attack patterns abuse exactly the kind of access hydra_account_balance_all_chains gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Near Hydra, and nothing reaches the server without passing your rules. This is the rule we recommend for hydra_account_balance_all_chains:
{
"version": "1",
"default": "deny",
"tools": {
"hydra_account_balance_all_chains": {}
}
}hydra_account_balance_all_chains is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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For a NEAR account, derive its addresses on every supported foreign chain and return all native-asset balances in one call. Errors on individual chains are reported per-chain — partial success is normal. It is categorised as a Read tool in the Near Hydra MCP Server, which means it retrieves data without modifying state.
Register the Near Hydra MCP server in PolicyLayer and add a rule for hydra_account_balance_all_chains: 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 Near Hydra. Nothing to install.
hydra_account_balance_all_chains 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 hydra_account_balance_all_chains 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 hydra_account_balance_all_chains. 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.
hydra_account_balance_all_chains is provided by the Near Hydra MCP server (nikshepsvn/near-hydra). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Near Hydra, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
21 Near Hydra tools catalogued and risk-classified — across an index of 43,000+ MCP servers.