List existing installment plans. Use this to see how pagination and plan summaries are returned by the Tunzaa API.
AI agents call list_installments to retrieve information from Tunzaa MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and displays existing installment plans with no side effects. It performs a data query operation without creating, modifying, deleting, or executing code. While it operates within a financial context (Tunzaa Payments), the tool itself only reads data and does not move money or commit financial obligations.
From the tool's definition Tool name 'list_installments' and description 'List existing installment plans' indicate retrieval without modification. The phrase 'see how pagination and plan summaries are returned' confirms query/read-only functionality.
Attacks that exploit this kind of access
List existing installment plans. Use this to see how pagination and plan summaries are returned by the Tunzaa API. It is categorised as a Read tool in the Tunzaa MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Tunzaa MCP Server MCP server in PolicyLayer and add a rule for list_installments: 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 Tunzaa MCP Server. Nothing to install.
list_installments is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list_installments 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.
Set action: deny in the PolicyLayer policy for list_installments. 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.
list_installments is provided by the Tunzaa MCP Server MCP server (tunzaa/tunzaa_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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