Search for products from the online store, hosted on Shopify. This tool can be used to search for products using natural language queries, specific filter criteria, or both. Best practices: - Searches return available_filters which can be used for refined follow-up searches - When filtering, use ...
Risk signalsAccepts freeform code/query input (query) · High parameter count (31 properties)
Part of the MicroEsim server.
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AI agents call search_shop_catalog to retrieve information from MicroEsim without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though search_shop_catalog only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"search_shop_catalog": {}
}
}See the full MicroEsim policy for all 5 tools.
These attack patterns abuse exactly the kind of access search_shop_catalog gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Search for products from the online store, hosted on Shopify. This tool can be used to search for products using natural language queries, specific filter criteria, or both. Best practices: - Searches return available_filters which can be used for refined follow-up searches - When filtering, use ONLY the filters from available_filters in follow-up searches - For specific filter searches (category, variant option, product type, etc.), use simple terms without the filter name (e.g., "red" not "red color") - For filter-specific searches (e.g., "find burton in snowboards" or "show me all available products in gray / green color"), use a two-step approach: 1. Perform a normal search to discover available filters 2. If relevant filters are returned, do a second search using the proper filter (productType, category, variantOption, etc.) with just the specific search term - Results are paginated, with initial results limited to improve experience - Use the after parameter with endCursor to fetch additional pages when users request more results The response includes product details, available variants, filter options, and pagination info.. It is categorised as a Read tool in the MicroEsim MCP Server, which means it retrieves data without modifying state.
Register the MicroEsim MCP server in PolicyLayer and add a rule for search_shop_catalog: 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 MicroEsim. Nothing to install.
search_shop_catalog 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 search_shop_catalog 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 search_shop_catalog. 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.
search_shop_catalog is provided by the MicroEsim MCP server (MicroEsim/instant-esim-data). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 5 MicroEsim tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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