add_business_days · TinyFn MCP: Risk & Policy

WHAT IT DOES

What add_business_days does on TinyFn

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

PARAMETERS

Parameter	Type	Required	Description
`days`	integer	Yes	Business days to add
`start_date`	string	Yes	Start date (YYYY-MM-DD)

Parameters from the server's own tool schema.

WHY IT NEEDS A POLICY

Why add_business_days needs a policy

An AI agent can call add_business_days faster than any human can review — one bad instruction and it creates or modifies resources in TinyFn by the hundred, each call as confident as the last.

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 TinyFn, so you can run agents against it safely.

FAQ

Questions about add_business_days

What does the add_business_days tool do? +

Add business days to a date. It is categorised as a Write tool in the TinyFn MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does add_business_days accept? +

add_business_days accepts 2 parameters: days, start_date. Required: days, start_date. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on add_business_days? +

Register the TinyFn 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 TinyFn. 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 TinyFn MCP server (https://api.tinyfn.io/mcp/all/). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.