Check how many leave days are left for the employee
AI agents call get_leave_balance to retrieve information from 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 leave balance information without creating, modifying, or deleting data. It is a simple information query with no destructive or financial implications. The blast radius of misuse is minimal — an agent could only view an employee's leave balance, not alter it.
From the tool's definition Tool description states 'Check how many leave days are left' — a query operation with no side effects. The server context confirms this is about checking leave balance alongside apply_leave (Write) and get_leave_history (Read), positioning this as a read-only…
Attacks that exploit this kind of access
Check how many leave days are left for the employee. It is categorised as a Read tool in the Leave Management MCP Server, which means it retrieves data without modifying state.
Register the Leave Management MCP server in PolicyLayer and add a rule for get_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 Leave Management. Nothing to install.
get_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 get_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 get_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.
get_leave_balance is provided by the Leave Management MCP server (kanthirayakota-cloud/mcp1_leave_manager). 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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