create_block_slot

Create a blocked time slot to prevent bookings during specific times

SERVERGhl SOURCEghl-mcp-server

Medium RISK CLASS

Category Write

Parameters 52 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/ghl/create-block-slot.md

WHAT IT DOES

What create_block_slot does on Ghl

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

Parameter	Type	Required	Description
`title`	string	—	Title/reason for the block (e.g., "Lunch Break", "Meeting")
`endTime`	string	Yes	End time of the block in ISO format (e.g., "2024-01-15T12:00:00-05:00")
`startTime`	string	Yes	Start time of the block in ISO format (e.g., "2024-01-15T10:00:00-05:00")
`calendarId`	string	—	Specific calendar to block (optional, blocks all if not specified)
`assignedUserId`	string	—	User ID to apply the block for

Parameters from the server's own tool schema.

RISK

Why create_block_slot is rated Medium

This falls under Write rather than Execute because it creates a calendar resource (a blocked slot) with predictable, reversible effects. While it affects availability, it doesn't execute arbitrary commands or permanently delete data.

From the tool's definition The tool creates a 'blocked time slot' — a new calendar/scheduling resource that prevents bookings during specified times. This is a write operation that creates/modifies scheduling data.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs create_block_slot safely

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

create_block_slot Rate-limited

create_block_slot 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": {
    "create_block_slot": {
      "limits": [
        {
          "counter": "create_block_slot_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 Ghl, apply this rule, and every create_block_slot call is checked against it from then on.

FAQ

Questions about create_block_slot

What does the create_block_slot tool do? +

Create a blocked time slot to prevent bookings during specific times. It is categorised as a Write tool in the Ghl MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does create_block_slot accept? +

create_block_slot accepts 5 parameters: title, endTime, startTime, calendarId, assignedUserId. Required: endTime, startTime. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on create_block_slot? +

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

What risk level is create_block_slot? +

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

Can I rate-limit create_block_slot? +

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

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

create_block_slot is provided by the Ghl MCP server (ghl-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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