prepare_kamino_repay

SERVERVaultPilot MCP SOURCEvaultpilot-mcp

Critical RISK CLASS

Category Financial

Parameters 33 required

Recommended Approval-gatedsee the rule below

Registry record Grade F, identity unverified Pull the record →

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

WHAT IT DOES

What prepare_kamino_repay does on VaultPilot MCP

AI agents use prepare_kamino_repay to commit financial operations through VaultPilot MCP, usually the final step of a payment, billing, or trading workflow. A call moves real money.

Parameter	Type	Required	Description
`mint`	string	Yes	Base58 Solana mainnet address (ed25519 pubkey, 43 or 44 chars).
`amount`	string	Yes	Human-readable amount to repay. The on-chain program clamps repayment at outstanding debt; over-repaying just doesn't burn the excess (no funds lost). Refuses w
`wallet`	string	Yes	Solana base58 wallet — must already have outstanding debt in the named reserve.

Parameters from the server's own tool schema.

RISK

Why prepare_kamino_repay is rated Critical

This tool constructs a DeFi transaction that repays outstanding debt on the Kamino lending protocol, directly committing financial obligations by moving crypto assets on-chain. Repaying debt is a financial operation — it transfers tokens from the user's wallet to settle a loan position. The blind-sign treatment and durable nonce indicate a real on-chain transaction is being prepared.

From the tool's definition 'Build a Kamino repay tx — pays down outstanding debt in the named reserve' and 'DURABLE NONCE REQUIRED + same blind-sign treatment as prepare_kamino_supply'

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs prepare_kamino_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_kamino_repay, this is the rule to start with:

prepare_kamino_repay Approval-gated

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

View as policy code

policy.json

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

GATE 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_kamino_repay call is checked against it from then on.

FAQ

Questions about prepare_kamino_repay

What does the prepare_kamino_repay tool do? +

Build a Kamino repay tx — pays down outstanding debt in the named reserve. Refuses with a clear error if the wallet has no debt in the reserve. The on-chain program clamps repayment at outstanding debt, so over-repaying just doesn't burn the excess (no funds lost). DURABLE NONCE REQUIRED + same blind-sign treatment as prepare_kamino_supply. It is categorised as a Financial tool in the VaultPilot MCP MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

What parameters does prepare_kamino_repay accept? +

prepare_kamino_repay accepts 3 parameters: mint, amount, wallet. Required: mint, 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_kamino_repay? +

Register the VaultPilot MCP server in PolicyLayer and add a rule for prepare_kamino_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_kamino_repay? +

prepare_kamino_repay 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 prepare_kamino_repay? +

Yes. Add a rate_limit block to the prepare_kamino_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_kamino_repay completely? +

Set action: deny in the PolicyLayer policy for prepare_kamino_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_kamino_repay? +

prepare_kamino_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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