AI agents use buy_token to commit financial operations through Pumpswap — usually the final step of a payment, billing, or trading workflow. A call moves real money.
Despite an empty description, the tool name 'buy_token' in the context of a PumpSwap MCP server (a decentralized exchange platform) with sibling tools like 'sell_token' and 'get_token_price' clearly indicates this tool executes financial transactions — purchasing tokens. This constitutes a Financial action as it commits financial obligations and moves assets.
From the tool's definition Tool name 'buy_token' on a server named 'pumpswap-mcp' alongside sibling tools 'sell_token', 'get_token_price', and 'get_pool_data' strongly implies token purchasing on a swap/DEX platform.
Documented attack patterns abuse exactly the kind of access buy_token gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Pumpswap, and nothing reaches the server without passing your rules. This is the rule we recommend for buy_token:
{
"version": "1",
"default": "deny",
"tools": {
"buy_token": {
"deny_if": [
{
"conditions": [],
"on_deny": "Requires human approval."
}
]
}
}
}Any call to buy_token is blocked until a human approves it. The rest of the server keeps working.
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buy_token. It is categorised as a Financial tool in the Pumpswap MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Pumpswap MCP server in PolicyLayer and add a rule for buy_token: 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 Pumpswap. Nothing to install.
buy_token is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the buy_token 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 buy_token. 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.
buy_token is provided by the Pumpswap MCP server (kukapay/pumpswap-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Pumpswap, 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.
4 Pumpswap tools catalogued and risk-classified — across an index of 43,000+ MCP servers.