AI agents use update_phone_number to create or update resources in GoHighLevel MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your GoHighLevel MCP Server environment.
This tool creates or modifies data reversibly—updating phone number settings for contacts in the CRM. It does not delete data (ruling out Destructive), execute arbitrary code (ruling out Execute), nor involve financial transactions (ruling out Financial). The blast radius is medium because incorrect phone number modifications could disrupt communications or affect customer contact records, but changes are reversible.
From the tool's definition Tool is named "update_phone_number" with description "Update phone number settings". The verb "update" indicates modification of existing data. The function operates within a CRM system managing contact information.
Documented attack patterns abuse exactly the kind of access update_phone_number 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 update_phone_number:
{
"version": "1",
"default": "deny",
"tools": {
"update_phone_number": {
"limits": [
{
"counter": "update_phone_number_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}update_phone_number 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.
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Update phone number settings. It is categorised as a Write tool in the GoHighLevel MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the GoHighLevel MCP Server MCP server in PolicyLayer and add a rule for update_phone_number: 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.
update_phone_number is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the update_phone_number 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 update_phone_number. 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.
update_phone_number is provided by the GoHighLevel MCP Server MCP server (busybee3333/go-high-level-mcp-2026-complete). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 566 GoHighLevel MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
566 GoHighLevel MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.