Get schema/metadata for any doctype
AI agents call get_doctype_schema 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 and schema definitions—read-only operations with no side effects. It does not create, modify, delete, or execute any operations. While it could theoretically inform an attacker about system structure, the severity is low because schema information is typically non-sensitive structural data and does not directly impact data or system state.
From the tool's definition Tool name 'get_doctype_schema' and description 'Get schema/metadata for any doctype' indicate retrieval of structural information only, with no modification or execution of operations.
Attacks that exploit this kind of access
Get schema/metadata for any 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_schema: 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_schema 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_schema 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_schema. 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_schema is provided by the ERPNext MCP Server MCP server (zero056/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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