AI agents call get_doctype_fields to retrieve information from ERPNext 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 metadata about document fields in ERPNext without side effects, altering data, executing code, or triggering financial operations. It is a read-only query operation used to discover the structure of data types, posing minimal security risk if exposed to an AI agent.
From the tool's definition Tool name 'get_doctype_fields' and description 'Get fields list for a specific DocType' indicate retrieval of schema/metadata information with no modification or execution of operations.
Documented attack patterns abuse exactly the kind of access get_doctype_fields gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and ERPNext MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_doctype_fields:
{
"version": "1",
"default": "deny",
"tools": {
"get_doctype_fields": {}
}
}get_doctype_fields is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get fields list for a specific DocType. It is categorised as a Read tool in the ERPNext MCP Server MCP Server, which means it retrieves data without modifying state.
Register the ERPNext MCP Server MCP server in PolicyLayer and add a rule for get_doctype_fields: 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 ERPNext MCP Server. Nothing to install.
get_doctype_fields 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 get_doctype_fields 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 get_doctype_fields. 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.
get_doctype_fields is provided by the ERPNext MCP Server MCP server (rakeshgangwar/erpnext-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 11 ERPNext MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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11 ERPNext MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.