Manually add an inbound message to a conversation
AI agents use add_inbound_message 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 new message records in a CRM conversation, which is a reversible write operation. It does not execute code, delete data irreversibly, or move money. The severity is medium because while message manipulation could be used to deceive or inject false communications into conversation histories (affecting business records and client interactions), the impact is limited to one CRM system and is…
From the tool's definition The tool name 'add_inbound_message' and description 'Manually add an inbound message to a conversation' indicates it creates or modifies message data within a conversation thread.
Documented attack patterns abuse exactly the kind of access add_inbound_message 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 add_inbound_message:
{
"version": "1",
"default": "deny",
"tools": {
"add_inbound_message": {
"limits": [
{
"counter": "add_inbound_message_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}add_inbound_message 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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Manually add an inbound message to a conversation. 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 add_inbound_message: 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.
add_inbound_message 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 add_inbound_message 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 add_inbound_message. 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.
add_inbound_message 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.