LIST METAFIELDS - List metafields, optionally filtered by owner_resource and owner_id.
AI agents call tiendanube_list_metafields to retrieve information from Tienda Nube 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 metafield data from the Tienda Nube API. It has no side effects, performs no modifications, and does not execute external operations or delete data. It falls squarely into the Read category as a data retrieval function.
From the tool's definition Tool name contains 'list' and description states 'List metafields' - this is a read-only operation that retrieves data without modification. The optional filtering parameters (owner_resource, owner_id) are query constraints, not write operations.
Attacks that exploit this kind of access
LIST METAFIELDS - List metafields, optionally filtered by owner_resource and owner_id. It is categorised as a Read tool in the Tienda Nube MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Tienda Nube MCP Server MCP server in PolicyLayer and add a rule for tiendanube_list_metafields: 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 Tienda Nube MCP Server. Nothing to install.
tiendanube_list_metafields 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 tiendanube_list_metafields 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 tiendanube_list_metafields. 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.
tiendanube_list_metafields is provided by the Tienda Nube MCP Server MCP server (pedrohsguimaraes/nuvem-shop-mcp-server). 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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