add_fee_liquidity

THE RISK

Critical Risk

Why add_fee_liquidity needs a policy

This tool commits real financial assets (tokens of equal USD value) to an AMM liquidity pool on a blockchain. This is a financial operation that moves or locks user funds, fitting the Financial category. Misuse by an AI agent could result in significant financial loss or unintended capital deployment.

From the tool's definition Add liquidity to a Fee AMM pool. You must provide equal USD value of both tokens.

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

POLICY

How to control add_fee_liquidity

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "add_fee_liquidity": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

Any call to add_fee_liquidity is blocked until a human approves it. The rest of the server keeps working.

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

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EXPLORE

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All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Human-in-the-loop → When a tool call should wait for a person — and when policy can decide alone.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
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FAQ

Questions about add_fee_liquidity

What does the add_fee_liquidity tool do? +

Add liquidity to a Fee AMM pool. You must provide equal USD value of both tokens. It is categorised as a Financial tool in the Tempo MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on add_fee_liquidity? +

Register the Tempo MCP server in PolicyLayer and add a rule for add_fee_liquidity: 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 Tempo. Nothing to install.

What risk level is add_fee_liquidity? +

add_fee_liquidity is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit add_fee_liquidity? +

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

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

add_fee_liquidity is provided by the Tempo MCP server (arome3/tempo-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Tempo tool call.

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

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