query_ledger

Search and filter the provenance ledger. Returns cryptographically linked entries with hash-chain validation.

SERVERNitrostack SOURCEnitrocloudofficial/nitrostack

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/nitrostack/query-ledger.md

WHAT IT DOES

What query_ledger does on Nitrostack

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

RISK

Why query_ledger is rated Low

Tool queries read-only ledger data with no mutations, side effects, or external operations.

From the tool's definition Search and filter the provenance ledger. Returns cryptographically linked entries.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs query_ledger safely

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

query_ledger Allowed

query_ledger 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": {
    "query_ledger": {}
  }
}

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

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

FAQ

Questions about query_ledger

What does the query_ledger tool do? +

Search and filter the provenance ledger. Returns cryptographically linked entries with hash-chain validation. It is categorised as a Read tool in the Nitrostack MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on query_ledger? +

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

What risk level is query_ledger? +

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

Can I rate-limit query_ledger? +

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

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

query_ledger is provided by the Nitrostack MCP server (nitrocloudofficial/nitrostack). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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