Proxy check_leave_balance to the leave-management leaf MCP
AI agents call check_leave_balance to retrieve information from MCP Leave Management without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or queries employee leave balance data with no side effects. It performs a read-only operation consistent with balance checks in leave management workflows. No data is created, modified, deleted, or financial transactions are initiated. The 'check' verb and 'balance' query pattern confirm this is a Read operation.
From the tool's definition Tool name 'check_leave_balance' and description 'Proxy check_leave_balance to the leave-management leaf MCP' indicate a query/lookup operation that retrieves leave balance information without modifying data.
Attacks that exploit this kind of access
Proxy check_leave_balance to the leave-management leaf MCP. It is categorised as a Read tool in the MCP Leave Management MCP Server, which means it retrieves data without modifying state.
Register the MCP Leave Management MCP server in PolicyLayer and add a rule for check_leave_balance: 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 MCP Leave Management. Nothing to install.
check_leave_balance 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 check_leave_balance 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 check_leave_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.
check_leave_balance is provided by the MCP Leave Management MCP server (jaylathiatr/mcp-leave-management). 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 →