assign_group_id | PolicyLayer

WHAT IT DOES

What assign_group_id does on Sperax Ecosystem Crypto & DeFI MCP Server

AI agents use assign_group_id to create or update resources in Sperax Ecosystem Crypto & DeFI MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Sperax Ecosystem Crypto & DeFI MCP Server environment.

THE RISK

Medium Risk

Why assign_group_id needs a policy

This tool modifies transaction records by assigning group identifiers, which is reversible data modification. It does not delete data (ruling out Destructive), does not move funds (ruling out Financial), and does not execute arbitrary code or blockchain state changes (ruling out Execute).

From the tool's definition Tool name 'assign_group_id' and description 'Assign a group ID to a list of transactions' indicates modification of transaction metadata or grouping state. The verb 'assign' denotes a create/modify action.

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

POLICY

How to control assign_group_id

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 assign_group_id:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "assign_group_id": {
      "limits": [
        {
          "counter": "assign_group_id_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

assign_group_id stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. 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.

LIMIT THIS TOOL →

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EXPLORE

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All 1318 Sperax Ecosystem Crypto & DeFI MCP Server tools →

Write 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.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about assign_group_id

What does the assign_group_id tool do? +

Assign a group ID to a list of transactions. It is categorised as a Write tool in the Sperax Ecosystem Crypto & DeFI MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on assign_group_id? +

Register the Sperax Ecosystem Crypto & DeFI MCP Server MCP server in PolicyLayer and add a rule for assign_group_id: 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 assign_group_id? +

assign_group_id is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit assign_group_id? +

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

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

assign_group_id 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 →

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1318 Sperax Ecosystem Crypto & DeFI MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.