Get a custom field or folder by its ID. Supports custom objects and company (business) fields.
AI agents call ghl_get_custom_field_by_id to retrieve information from GoHighLevel MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or queries custom field data by ID without side effects. It does not create, modify, delete, or execute any operations. The action is read-only and informational, characteristic of a Read category tool. Severity is low because unauthorized access to field metadata poses minimal immediate risk compared to tools that modify contacts, trigger campaigns, or delete data.
From the tool's definition Tool name contains 'get' and description states 'Get a custom field or folder by its ID' — a straightforward retrieval operation with no modification, deletion, or execution capability.
Documented attack patterns abuse exactly the kind of access ghl_get_custom_field_by_id gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and GoHighLevel MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for ghl_get_custom_field_by_id:
{
"version": "1",
"default": "deny",
"tools": {
"ghl_get_custom_field_by_id": {}
}
}ghl_get_custom_field_by_id is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get a custom field or folder by its ID. Supports custom objects and company (business) fields. It is categorised as a Read tool in the GoHighLevel MCP Server MCP Server, which means it retrieves data without modifying state.
Register the GoHighLevel MCP Server MCP server in PolicyLayer and add a rule for ghl_get_custom_field_by_id: 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 GoHighLevel MCP Server. Nothing to install.
ghl_get_custom_field_by_id 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 ghl_get_custom_field_by_id 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 ghl_get_custom_field_by_id. 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.
ghl_get_custom_field_by_id is provided by the GoHighLevel MCP Server MCP server (mastanley13/gohighlevel-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 255 GoHighLevel MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
255 GoHighLevel MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.