get_vault_nav

Get the current Net Asset Value (NAV) of an ATV vault in USD.

SERVERAtv SOURCEaarna-ai/atv

Low RISK CLASS

Category Read

Parameters 10 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/aarna-ai-atv/get-vault-nav.md

WHAT IT DOES

What get_vault_nav does on Atv

AI agents call get_vault_nav to retrieve information from Atv 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	Description
`address`	string	—	Vault contract address

Parameters from the server's own tool schema.

RISK

Why get_vault_nav is rated Low

This is a read-only query that retrieves current vault metrics (NAV in USD). It has no side effects, does not execute transactions, and does not move funds or commit financial obligations. Even in the context of a DeFi protocol, fetching current valuations is a harmless data retrieval operation with minimal blast radius if misused by an AI agent.

From the tool's definition Tool name and description indicate a query operation: 'Get the current Net Asset Value (NAV)' with no indication of state modification, transaction creation, or financial movement. It retrieves pricing/performance data.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs get_vault_nav safely

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

get_vault_nav Allowed

get_vault_nav 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": {
    "get_vault_nav": {}
  }
}

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

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

FAQ

Questions about get_vault_nav

What does the get_vault_nav tool do? +

Get the current Net Asset Value (NAV) of an ATV vault in USD. It is categorised as a Read tool in the Atv MCP Server, which means it retrieves data without modifying state.

What parameters does get_vault_nav accept? +

get_vault_nav accepts 1 parameter: address. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on get_vault_nav? +

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

What risk level is get_vault_nav? +

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

Can I rate-limit get_vault_nav? +

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

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

get_vault_nav is provided by the Atv MCP server (aarna-ai/atv). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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