Low Risk

get_swap_quote

Get a swap quote for exchanging tokens. Returns expected output amount and price impact.

How to control get_swap_quote ↓

AI agents call get_swap_quote to retrieve information from BNB Chain MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

Low Risk

This tool retrieves information about a hypothetical token swap without committing or executing any transaction. It functions as a pricing/simulation endpoint, analogous to requesting a quote before making a purchase. No funds are moved, no data is modified, and no irreversible actions occur. The tool belongs in the Read category as it performs a data retrieval operation.

From the tool's definition Tool description states it 'Get[s] a swap quote' and 'Returns expected output amount and price impact' — these are query/retrieval operations with no side effects. No execution of a transaction, no state modification.

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

PolicyLayer is an MCP gateway — it sits between your AI agents and BNB Chain MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for get_swap_quote:

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_swap_quote": {}
  }
}

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

  1. Create a free account and register BNB Chain MCP — nothing to install.
  2. Add this policy — paste it, or build it visually.
  3. Point your MCP client (Claude, Cursor, anything) at your gateway URL.
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Go deeper

What does the get_swap_quote tool do? +

Get a swap quote for exchanging tokens. Returns expected output amount and price impact. It is categorised as a Read tool in the BNB Chain MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_swap_quote? +

Register the BNB Chain MCP server in PolicyLayer and add a rule for get_swap_quote: 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 BNB Chain MCP. Nothing to install.

What risk level is get_swap_quote? +

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

Can I rate-limit get_swap_quote? +

Yes. Add a rate_limit block to the get_swap_quote 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 get_swap_quote completely? +

Set action: deny in the PolicyLayer policy for get_swap_quote. 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 get_swap_quote? +

get_swap_quote is provided by the BNB Chain MCP server (nirholas/bnbchain-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every BNB Chain MCP tool call.

Deterministic rules across all 1240 BNB Chain MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

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1240 BNB Chain MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.

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