AI agents call main as a supporting operation in Monarch workflows.
The description only states it is a 'main entry point' with no detail about what operations it performs. Without evidence of read, write, execute, destructive, or financial behavior, this falls into Other. Confidence is low due to the uninformative description.
From the tool's definition 'Main entry point for the server.' — the description is generic and uninformative; it does not describe any specific action performed on data or external systems.
Documented attack patterns abuse exactly the kind of access main gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Monarch, and nothing reaches the server without passing your rules. This is the rule we recommend for main:
{
"version": "1",
"default": "deny",
"tools": {
"main": {
"limits": [
{
"counter": "main_rate",
"window": "minute",
"max": 60,
"scope": "grant"
}
]
}
}
}main gets a rate cap, and everything else on the server is denied unless you say otherwise.
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Main entry point for the server. It is categorised as a Other tool in the Monarch MCP Server, which means it performs auxiliary operations.
Register the Monarch MCP server in PolicyLayer and add a rule for main: 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 Monarch. Nothing to install.
main is a Other tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the main 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 main. 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.
main is provided by the Monarch MCP server (robcerda/monarch-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 50 Monarch tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
50 Monarch tools catalogued and risk-classified — across an index of 42,500+ MCP servers.