prepare_aave_repay

Build an unsigned Aave V3 repay transaction. If an ERC-20 approve() is required first, it is returned as the outer tx and repay is in .next. Pass amount: "max" to repay the full debt.

SERVERVaultPilot MCP SOURCEvaultpilot-mcp

High RISK CLASS

Category Execute

Parameters 53 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-szhygulin-vaultpilot-mcp/prepare-aave-repay.md

WHAT IT DOES

What prepare_aave_repay does on VaultPilot MCP

AI agents invoke prepare_aave_repay to trigger actions in VaultPilot MCP. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

Parameter	Type	Required	Description
`asset`	string	Yes
`chain`	string	—
`amount`	string	Yes	Human-readable decimal amount of `asset`, NOT raw wei/base units. Example: "1.5" for 1.5 USDC, "0.01" for 0.01 ETH. Pass "max" for full-balance withdraw/repay.
`wallet`	string	Yes
`approvalCap`	string	—	Cap on the ERC-20 approval preceding this action. Omit for "unlimited" (standard DeFi UX — fewer follow-up approvals). Pass "exact" to approve only what this ac

Parameters from the server's own tool schema.

RISK

Why prepare_aave_repay is rated High

This tool constructs a DeFi repayment transaction (and optionally an ERC-20 approve) for execution on Aave V3. While it builds an unsigned transaction rather than broadcasting it, it is preparing an on-chain operation that interacts with a lending protocol and can trigger token approvals and debt repayments. The chained `.next` structure and 'max' repayment option indicate significant financial impact potential.

From the tool's definition 'Build an unsigned Aave V3 repay transaction' and 'Pass amount: "max" to repay the full debt'

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs prepare_aave_repay safely

PolicyLayer is an MCP gateway: it sits between your AI agents and VaultPilot MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For prepare_aave_repay, this is the rule to start with:

prepare_aave_repay Rate-limited

prepare_aave_repay stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "prepare_aave_repay": {
      "limits": [
        {
          "counter": "prepare_aave_repay_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect VaultPilot MCP, apply this rule, and every prepare_aave_repay call is checked against it from then on.

FAQ

Questions about prepare_aave_repay

What does the prepare_aave_repay tool do? +

Build an unsigned Aave V3 repay transaction. If an ERC-20 approve() is required first, it is returned as the outer tx and repay is in .next. Pass amount: "max" to repay the full debt. It is categorised as a Execute tool in the VaultPilot MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

What parameters does prepare_aave_repay accept? +

prepare_aave_repay accepts 5 parameters: asset, chain, amount, wallet, approvalCap. Required: asset, amount, wallet. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on prepare_aave_repay? +

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

What risk level is prepare_aave_repay? +

prepare_aave_repay is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit prepare_aave_repay? +

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

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

prepare_aave_repay is provided by the VaultPilot MCP server (vaultpilot-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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