Medium Risk

ra_balance

Check available balance in your Ra Pay account. Returns current balance, pending amounts, and payout schedule.

Part of the Ra Pay MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.

@rapay/mcp-server Write Risk 2/5

AI agents use ra_balance to create or modify resources in Ra Pay. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.

Without a policy, an AI agent could call ra_balance repeatedly, creating or modifying resources faster than any human could review. Intercept's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Ra Pay.

Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.

ra-pay.yaml
tools:
  ra_balance:
    rules:
      - action: allow
        rate_limit:
          max: 30
          window: 60

See the full Ra Pay policy for all 8 tools.

Tool Name ra_balance
Category Write
MCP Server Ra Pay MCP Server
Risk Level Medium

Agents calling write-class tools like ra_balance have been implicated in these attack patterns. Read the full case and prevention policy for each:

Browse the full MCP Attack Database →

Other tools in the Write risk category across the catalogue. The same policy patterns (rate-limit, validate) apply to each.

What does the ra_balance tool do? +

Check available balance in your Ra Pay account. Returns current balance, pending amounts, and payout schedule.. It is categorised as a Write tool in the Ra Pay MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on ra_balance? +

Add a rule in your Intercept YAML policy under the tools section for ra_balance. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Ra Pay MCP server.

What risk level is ra_balance? +

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

Can I rate-limit ra_balance? +

Yes. Add a rate_limit block to the ra_balance rule in your Intercept 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 ra_balance completely? +

Set action: deny in the Intercept policy for ra_balance. 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 ra_balance? +

ra_balance is provided by the Ra Pay MCP server (@rapay/mcp-server). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policies on Ra Pay

Open source. One binary. Zero dependencies.

npx -y @policylayer/intercept
github.com/policylayer/intercept →
// GET IN TOUCH

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