get-metafield-definition
AI agents call get-metafield-definition to retrieve information from Shopify 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 definition metadata from a Shopify store. It performs no data modification, deletion, or external execution—purely a data retrieval operation. The empty description is partially mitigated by consistent naming convention and server-level documentation confirming read-only access. Severity is low because metafield definitions are schema metadata with minimal sensitive information exposure.
From the tool's definition Tool name 'get-metafield-definition' and server description states 'read-only tools' that enable 'querying Shopify store data'. The 'get-' prefix and sibling tools (get-articles, get-blogs, get-collections, etc.) all follow read query patterns.
Attacks that exploit this kind of access
get-metafield-definition. It is categorised as a Read tool in the Shopify MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Shopify MCP Server MCP server in PolicyLayer and add a rule for get-metafield-definition: 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 Shopify MCP Server. Nothing to install.
get-metafield-definition 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-metafield-definition 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-metafield-definition. 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-metafield-definition is provided by the Shopify MCP Server MCP server (tooeasy-crew/shopify-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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