deduct_credit

Consume one credit from a client

SERVERBusinys SOURCE@businys/mcp-server

Critical RISK CLASS

Category Financial

Parameters 00 required

Recommended Approval-gatedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/app-businys-mcp-server/deduct-credit.md

WHAT IT DOES

What deduct_credit does on Businys

AI agents use deduct_credit to commit financial operations through Businys, usually the final step of a payment, billing, or trading workflow. A call moves real money.

RISK

Why deduct_credit is rated Critical

Consuming/deducting a credit from a client's account is a financial operation that reduces the client's balance or prepaid units. This directly affects financial standing and billing, placing it in the Financial category. Misuse could lead to incorrect billing or unauthorized credit consumption, making severity high.

From the tool's definition "Consume one credit from a client" — this tool deducts (removes) a financial credit from a client's account

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs deduct_credit safely

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

deduct_credit Approval-gated

Any call to deduct_credit is blocked until a human approves it. The rest of the server keeps working.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "deduct_credit": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

GATE THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about deduct_credit

What does the deduct_credit tool do? +

Consume one credit from a client. It is categorised as a Financial tool in the Businys MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on deduct_credit? +

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

What risk level is deduct_credit? +

deduct_credit is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit deduct_credit? +

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

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

deduct_credit is provided by the Businys MCP server (@businys/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Businys, and thousands of servers like it.

This server

All 248 Businys tools → Critical-risk tools on this server →

Across the catalogue

All critical-risk MCP tools → The MCP Attack Database →

Guides

Govern MCP payment tools →Human-in-the-loop →Tool call approval →