hydra_swap_tokens

THE RISK

Low Risk

Why hydra_swap_tokens needs a policy

Despite the name 'hydra_swap_tokens' suggesting a swap operation, the description clearly states this tool only lists/reads token information (assetId, blockchain, contractAddress, symbol, decimals, USD price). It is purely a data retrieval operation with no side effects. The mismatch between name and description lowers confidence slightly.

From the tool's definition List all tokens supported by NEAR Intents 1Click for cross-chain swaps. Each entry includes assetId, blockchain, contractAddress, symbol, decimals, USD price.

Documented attack patterns abuse exactly the kind of access hydra_swap_tokens gives an agent:

POLICY

How to control hydra_swap_tokens

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_swap_tokens:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "hydra_swap_tokens": {}
  }
}

hydra_swap_tokens is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Near Hydra — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Near Hydra tools

Financial hydra_swap_execute Execute an end-to-end cross-chain swap via NEAR Intents 1Click. Auto-routes the origin sen Financial hydra_swap_submit_deposit Notify 1Click that the deposit transaction has been broadcast. depositAddress comes from a Financial hydra_ensure_gas Top up the derived foreign-chain address with native gas, via a small NEAR Intents 1Click Financial hydra_send_btc Send BTC from a Chain-Signature-derived Bitcoin address. UTXO selection via Mempool API. S Financial hydra_send_evm Send a transaction on an EVM chain from a Chain-Signature-derived address. Supports native Financial hydra_send_ft Send a NEP-141 fungible token from the configured account. Calls ft_transfer with 1 yoctoN Financial hydra_send_near Send native NEAR from the configured account. SAFE BY DEFAULT: dry=true returns the plan w Financial hydra_send_solana Send native SOL from a Chain-Signature-derived Solana address. SAFE: dry=true returns the

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about hydra_swap_tokens

What does the hydra_swap_tokens tool do? +

List all tokens supported by NEAR Intents 1Click for cross-chain swaps. Each entry includes assetId, blockchain, contractAddress, symbol, decimals, USD price. It is categorised as a Read tool in the Near Hydra MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on hydra_swap_tokens? +

Register the Near Hydra MCP server in PolicyLayer and add a rule for hydra_swap_tokens: 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.

What risk level is hydra_swap_tokens? +

hydra_swap_tokens is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit hydra_swap_tokens? +

Yes. Add a rate_limit block to the hydra_swap_tokens 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.

How do I block hydra_swap_tokens completely? +

Set action: deny in the PolicyLayer policy for hydra_swap_tokens. 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.

What MCP server provides hydra_swap_tokens? +

hydra_swap_tokens 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.

Enforce policy on every Near Hydra tool call.

Start from Near Hydra, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →