agents_get_categories

THE RISK

Low Risk

Why agents_get_categories needs a policy

The tool retrieves informational data about agent categories and counts. No data is modified, no code is executed, no financial transactions occur, and no data is deleted. This is a straightforward read/query operation with minimal security impact - it simply lists available categories, making it Read category with low severity.

From the tool's definition Tool description states 'Get available agent categories and their counts' - this is a retrieval operation that queries metadata about available agent categories without modifying, executing, or affecting any state.

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

POLICY

How to control agents_get_categories

PolicyLayer is an MCP gateway — it sits between your AI agents and Sperax Ecosystem Crypto & DeFI MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for agents_get_categories:

policy.json

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

agents_get_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 Sperax Ecosystem Crypto & DeFI 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.

CAP THIS TOOL →

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EXPLORE

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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 agents_get_categories

What does the agents_get_categories tool do? +

Get available agent categories and their counts. Useful for discovering what types of AI agents are available in the ecosystem. It is categorised as a Read tool in the Sperax Ecosystem Crypto & DeFI MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on agents_get_categories? +

Register the Sperax Ecosystem Crypto & DeFI MCP Server MCP server in PolicyLayer and add a rule for agents_get_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 Sperax Ecosystem Crypto & DeFI MCP Server. Nothing to install.

What risk level is agents_get_categories? +

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

Can I rate-limit agents_get_categories? +

Yes. Add a rate_limit block to the agents_get_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 agents_get_categories completely? +

Set action: deny in the PolicyLayer policy for agents_get_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 agents_get_categories? +

agents_get_categories is provided by the Sperax Ecosystem Crypto & DeFI MCP Server MCP server (sperax/sperax-crypto-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Sperax Ecosystem Crypto & DeFI MCP Server tool call.

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

CHECK YOUR STACK →