find_business_by_phone
AI agents call find_business_by_phone to retrieve information from Yelp Mcp Min without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves business information using a phone number as a search parameter, which is a read-only query operation analogous to the other business search and lookup tools on the server. It has no capacity to modify, delete, or execute code. The lack of individual tool description reduces confidence slightly, but the server context and naming convention strongly indicate a retrieval operation.
From the tool's definition The tool is named 'find_business_by_phone' and belongs to a server with sibling tools 'get_business', 'match_business', and 'search_businesses', all of which are query/lookup operations.
Attacks that exploit this kind of access
find_business_by_phone. It is categorised as a Read tool in the Yelp Mcp Min MCP Server, which means it retrieves data without modifying state.
Register the Yelp Mcp Min MCP server in PolicyLayer and add a rule for find_business_by_phone: 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 Yelp Mcp Min. Nothing to install.
find_business_by_phone 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 find_business_by_phone 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 find_business_by_phone. 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.
find_business_by_phone is provided by the Yelp Mcp Min MCP server (miqui/yelp-mcp-min). 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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