Counts the number of top-ups for a specific phone number.
AI agents call count_topups_by_number to retrieve information from Africa's Talking Airtime MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only aggregation of historical top-up transactions. It queries data to count occurrences by phone number but does not create, modify, delete, or transfer funds. The operation is purely informational with no side effects, making it a Read category tool with low risk severity.
From the tool's definition Tool name 'count_topups_by_number' and description 'Counts the number of top-ups for a specific phone number' indicate a query operation that retrieves and aggregates existing transaction data without modifying, deleting, or moving money.
Attacks that exploit this kind of access
Counts the number of top-ups for a specific phone number. It is categorised as a Read tool in the Africa's Talking Airtime MCP MCP Server, which means it retrieves data without modifying state.
Register the Africa's Talking Airtime MCP server in PolicyLayer and add a rule for count_topups_by_number: 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 Africa's Talking Airtime MCP. Nothing to install.
count_topups_by_number 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 count_topups_by_number 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 count_topups_by_number. 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.
count_topups_by_number is provided by the Africa's Talking Airtime MCP server (nasoma/africastalking-airtime-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.
Teams ship this data inside their own products. See what a licence covers →