Calculate Annual Recurring Revenue (ARR = MRR × 12) for a given month using the same vetted subscription logic as get_mrr.
AI agents call get_arr to retrieve information from Semantic BI MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and computes a derived business metric (ARR) from existing subscription data without creating, modifying, or deleting any records. It is a deterministic calculation over vetted data, posing minimal risk if misused by an AI agent—worst case is incorrect analysis from bad parameters, not data loss or unauthorized changes.
From the tool's definition Tool description states it 'Calculate[s] Annual Recurring Revenue' using 'vetted subscription logic' with no parameters suggesting data modification.
Attacks that exploit this kind of access
Calculate Annual Recurring Revenue (ARR = MRR × 12) for a given month using the same vetted subscription logic as get_mrr. It is categorised as a Read tool in the Semantic BI MCP MCP Server, which means it retrieves data without modifying state.
Register the Semantic BI MCP server in PolicyLayer and add a rule for get_arr: 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 Semantic BI MCP. Nothing to install.
get_arr 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_arr 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_arr. 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_arr is provided by the Semantic BI MCP server (lovrobubanic/semantic-bi-mcp). 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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