Proxy list_pending_approvals to the leave-management leaf MCP
AI agents call list_pending_approvals 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 information about pending approvals in the leave management system. It performs no side effects, does not create, modify, or delete data, and does not execute external code or trigger financial transactions. It is a straightforward data retrieval operation appropriate for managers or HR personnel to view the current state of leave requests awaiting their action.
From the tool's definition Tool name 'list_pending_approvals' and description indicate it retrieves/queries pending leave approvals without modifying data. The verb 'list' and 'proxy' terminology suggest a read-only operation that queries the state of leave requests.
Attacks that exploit this kind of access
Proxy list_pending_approvals 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 list_pending_approvals: 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.
list_pending_approvals 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 list_pending_approvals 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 list_pending_approvals. 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.
list_pending_approvals 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.
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