AI agents call estimate_cost to retrieve information from Citrix without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and calculates pricing information without creating, modifying, deleting, or executing external operations. It is a query/calculation function that produces informational output. The only potential concern is if estimates could mislead financial decisions, but the tool itself does not execute transactions, commit obligations, or modify any state.
From the tool's definition Tool performs cost estimation and calculation based on input parameters (user count, tier, term length), returning 'monthly per-user cost and annual total' with no modification of any systems or data.
Attacks that exploit this kind of access
Estimate Citrix licensing costs under the UHMC model for a given user count, tier, and term length. Returns monthly per-user cost and annual total. It is categorised as a Read tool in the Citrix MCP Server, which means it retrieves data without modifying state.
Register the Citrix MCP server in PolicyLayer and add a rule for estimate_cost: 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 Citrix. Nothing to install.
estimate_cost 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 estimate_cost 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 estimate_cost. 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.
estimate_cost is provided by the Citrix MCP server (skipmiller/citrix-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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