simulate_position_change

SERVERVaultPilot MCP SOURCEvaultpilot-mcp

Low RISK CLASS

Category Read

Parameters 84 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-szhygulin-vaultpilot-mcp/simulate-position-change.md

WHAT IT DOES

What simulate_position_change does on VaultPilot MCP

AI agents call simulate_position_change to retrieve information from VaultPilot MCP without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

Parameter	Type	Required
`asset`	string	Yes
`chain`	string	—
`action`	string	Yes
`market`	string	—
`wallet`	string	Yes
`marketId`	string	—
`protocol`	string	—
`amountUsd`	number	Yes

Parameters from the server's own tool schema.

RISK

Why simulate_position_change is rated Low

This tool performs a read-only simulation of DeFi lending positions. It queries protocol state and computes projected outcomes based on hypothetical parameter changes, but sends no transactions and causes no side effects. Despite its access to financial systems, the tool itself does not move funds, modify state, or execute external operations—it merely retrieves and computes data.

From the tool's definition Tool description explicitly states 'Simulate' and 'No transaction is sent.' It returns 'projected health factor and collateral/debt totals' without executing any on-chain operations.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

simulate_position_change Allowed

simulate_position_change is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "simulate_position_change": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about simulate_position_change

What does the simulate_position_change tool do? +

Simulate the effect of adding or removing collateral, or borrowing/repaying debt on a lending position. Returns the projected health factor and collateral/debt totals. Supports Aave V3 (default), Compound V3 (pass protocol: "compound-v3" + market Comet address), and Morpho Blue (pass protocol: "morpho-blue" + marketId bytes32). No transaction is sent. It is categorised as a Read tool in the VaultPilot MCP MCP Server, which means it retrieves data without modifying state.

What parameters does simulate_position_change accept? +

simulate_position_change accepts 8 parameters: asset, chain, action, market, wallet, marketId, protocol, amountUsd. Required: asset, action, wallet, amountUsd. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on simulate_position_change? +

Register the VaultPilot MCP server in PolicyLayer and add a rule for simulate_position_change: 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 simulate_position_change? +

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

Can I rate-limit simulate_position_change? +

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

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

simulate_position_change 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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