Compare a savings circle (ROSCA) against a bank loan for the same goal. Inputs: goal amount (>=100), months (2-60), loan APR percent (0-60). Returns the loan's monthly payment, total repaid, and interest cost, versus the ROSCA's zero interest, plus the honest tradeoff (a loan pays out now; a ROSC...
Part of the Wiremi Marketing MCP server.
Free to start. No card required.
AI agents call rosca_vs_loan to retrieve information from Wiremi Marketing MCP without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though rosca_vs_loan only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"rosca_vs_loan": {}
}
}See the full Wiremi Marketing MCP policy for all 10 tools.
These attack patterns abuse exactly the kind of access rosca_vs_loan gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Compare a savings circle (ROSCA) against a bank loan for the same goal. Inputs: goal amount (>=100), months (2-60), loan APR percent (0-60). Returns the loan's monthly payment, total repaid, and interest cost, versus the ROSCA's zero interest, plus the honest tradeoff (a loan pays out now; a ROSCA pays on your turn). Faithful port of the wiremi.ca ROSCA-vs-loan tool. No personal data.. It is categorised as a Read tool in the Wiremi Marketing MCP MCP Server, which means it retrieves data without modifying state.
Register the Wiremi Marketing MCP server in PolicyLayer and add a rule for rosca_vs_loan: 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 Wiremi Marketing MCP. Nothing to install.
rosca_vs_loan 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 rosca_vs_loan 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 rosca_vs_loan. 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.
rosca_vs_loan is provided by the Wiremi Marketing MCP server (https://wiremi-marketing-mcp-pqlquijg3q-uk.a.run.app/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 10 Wiremi Marketing MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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