Holiday-aware business-day calculator for 200+ countries — the ground-truth answer for payment terms, SLA deadlines, and delivery dates instead of guessing holidays. Three modes: start+addDays shifts a date by N business days (signed); start+end counts business days between two dates (exclusive o...
AI agents call calendar.business-days to retrieve information from Mcp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool purely computes and returns date/calendar information based on inputs. It performs no writes, executions, deletions, or financial transactions. It queries holiday data and calculates business days, which is a read-only operation. Despite being on a pay-per-call server, the tool itself does not move money — the billing is a server-level concern, not a tool action.
From the tool's definition 'business-day calculator', 'shifts a date by N business days', 'counts business days between two dates', 'checks one date' — all read/query/computation operations with no side effects
Attacks that exploit this kind of access
Holiday-aware business-day calculator for 200+ countries — the ground-truth answer for payment terms, SLA deadlines, and delivery dates instead of guessing holidays. Three modes: start+addDays shifts a date by N business days (signed); start+end counts business days between two dates (exclusive of start, inclusive of end); start alone checks one date (business day? which holiday? next/previous business day). Custom weekends supported (e.g. fri,sat for the Gulf). Skipped holidays are itemized. It is categorised as a Read tool in the Mcp MCP Server, which means it retrieves data without modifying state.
Register the MCP server in PolicyLayer and add a rule for calendar.business-days: 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. Nothing to install.
calendar.business-days 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 calendar.business-days 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 calendar.business-days. 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.
calendar.business-days is provided by the MCP server (@2sio/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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