Forward percentage calculations to the calculator module.
AI agents call calculate_percentage to retrieve information from Calculator Tools MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs stateless percentage calculations and produces output without creating, modifying, deleting, or executing external operations. It is a straightforward read-only computational utility with negligible risk even if misused by an agent (worst case: incorrect arithmetic or resource exhaustion from repeated calls).
From the tool's definition Tool description states 'Forward percentage calculations to the calculator module' — a pure mathematical operation with no side effects. The tool name and context (temperature conversion, percentage calculation) indicate deterministic computation only.
Attacks that exploit this kind of access
Forward percentage calculations to the calculator module. It is categorised as a Read tool in the Calculator Tools MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Calculator Tools MCP Server MCP server in PolicyLayer and add a rule for calculate_percentage: 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 Calculator Tools MCP Server. Nothing to install.
calculate_percentage 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 calculate_percentage 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 calculate_percentage. 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.
calculate_percentage is provided by the Calculator Tools MCP Server MCP server (yogeshkk2/mcp-server). 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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