add_business_days · Shikamaru MCP: Risk & Policy

WHAT IT DOES

What add_business_days does on Shikamaru

AI agents use add_business_days to create or update resources in Shikamaru — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Shikamaru environment.

WHY IT NEEDS A POLICY

Why add_business_days needs a policy

This tool creates or modifies date values based on business day adjustments—a reversible transformation rather than destructive deletion. It qualifies as Write rather than Execute because it performs a deterministic calculation rather than triggering arbitrary external operations or code execution.

From the tool's definition Tool description states it will 'Move a signed number of business days' and performs 'settlement math' on dates. This modifies/transforms date values, creating a new calculated date.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_business_days Rate-limited

add_business_days stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "add_business_days": {
      "limits": [
        {
          "counter": "add_business_days_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Shikamaru, so you can run agents against it safely.

FAQ

Questions about add_business_days

What does the add_business_days tool do? +

Move a signed number of business days under a holiday calendar (settlement math: T+2 is count 2). Zero returns the date unchanged. Deterministic. It is categorised as a Write tool in the Shikamaru MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add_business_days? +

Register the Shikamaru MCP server in PolicyLayer and add a rule for add_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 Shikamaru. Nothing to install.

What risk level is add_business_days? +

add_business_days is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit add_business_days? +

Yes. Add a rate_limit block to the add_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.

How do I block add_business_days completely? +

Set action: deny in the PolicyLayer policy for add_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.

What MCP server provides add_business_days? +

add_business_days is provided by the Shikamaru MCP server (JayOfemi/shikamaru). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.