list_nodit_api_categories

THE RISK

Low Risk

Why list_nodit_api_categories needs a policy

This tool retrieves metadata about available API categories from Nodit's blockchain infrastructure. It performs a simple enumeration operation that returns information without creating, modifying, deleting, executing code, or moving funds. The tool is a prerequisite for other operations but performs no state changes itself.

From the tool's definition Tool description states it 'Lists available Nodit API categories' - a pure listing/enumeration operation with no side effects. The verb 'Lists' and the clarification that it retrieves metadata about available categories confirms read-only behavior.

Documented attack patterns abuse exactly the kind of access list_nodit_api_categories gives an agent:

POLICY

How to control list_nodit_api_categories

PolicyLayer is an MCP gateway — it sits between your AI agents and Nodit MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for list_nodit_api_categories:

policy.json

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

list_nodit_api_categories is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Nodit MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

Related tools and policies

More Nodit MCP Server tools

Execute call_nodit_api This function calls a specific Nodit Blockchain Context API using its operationId. Before Read call_nodit_aptos_indexer_api Calls a Nodit Aptos Indexer API. Returns the API response. Before making the call, it Read get_nodit_api_spec Gets the fully resolved spec details for a Nodit Blockchain Context API operationId. Retur Read get_nodit_aptos_indexer_api_spec Returns the GraphQL specification for a specific query root in the Nodit Aptos Indexer API Read list_nodit_aptos_indexer_api_query_root Lists all query roots available in the Nodit Aptos Indexer GraphQL API. Read list_nodit_data_apis Lists available Nodit Data API operations. Read list_nodit_node_apis Lists available Nodit API operations.

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Read tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about list_nodit_api_categories

What does the list_nodit_api_categories tool do? +

Lists available Nodit API categories from Nodit Blockchain Context. To use the Nodit API tool, you must first call this tool. It is categorised as a Read tool in the Nodit MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_nodit_api_categories? +

Register the Nodit MCP Server MCP server in PolicyLayer and add a rule for list_nodit_api_categories: 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 Nodit MCP Server. Nothing to install.

What risk level is list_nodit_api_categories? +

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

Can I rate-limit list_nodit_api_categories? +

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

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

list_nodit_api_categories is provided by the Nodit MCP Server MCP server (noditlabs/nodit-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Nodit MCP Server tool call.

Start from Nodit MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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