join_waitlist

Join the waitlist for a fully booked group session. Client will be auto-promoted when a spot opens.

SERVERBusinys SOURCE@businys/mcp-server

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/app-businys-mcp-server/join-waitlist.md

WHAT IT DOES

What join_waitlist does on Businys

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

RISK

Why join_waitlist is rated Medium

This tool creates a waitlist entry for a client, which is a reversible write operation (the client can be removed from the waitlist). The auto-promotion side effect is contingent on a spot opening, but the primary action is creating/modifying a record. No financial commitment, code execution, or irreversible destruction is involved.

From the tool's definition Join the waitlist for a fully booked group session. Client will be auto-promoted when a spot opens.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs join_waitlist safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Businys, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For join_waitlist, this is the rule to start with:

join_waitlist Rate-limited

join_waitlist 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": {
    "join_waitlist": {
      "limits": [
        {
          "counter": "join_waitlist_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Businys, apply this rule, and every join_waitlist call is checked against it from then on.

FAQ

Questions about join_waitlist

What does the join_waitlist tool do? +

Join the waitlist for a fully booked group session. Client will be auto-promoted when a spot opens. It is categorised as a Write tool in the Businys MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on join_waitlist? +

Register the Businys MCP server in PolicyLayer and add a rule for join_waitlist: 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 Businys. Nothing to install.

What risk level is join_waitlist? +

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

Can I rate-limit join_waitlist? +

Yes. Add a rate_limit block to the join_waitlist 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 join_waitlist completely? +

Set action: deny in the PolicyLayer policy for join_waitlist. 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 join_waitlist? +

join_waitlist is provided by the Businys MCP server (@businys/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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