List all phone numbers for a contact.
AI agents call list_contact_phones to retrieve information from CATS MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns contact phone number information. It performs a read-only operation that retrieves existing data without creating, modifying, deleting, executing code, or committing financial actions. The verb 'list' and lack of any action words suggest a simple data lookup operation. Severity is low because exposure of contact phone numbers, while potentially sensitive, is a retrieval action only.
From the tool's definition Tool name 'list_contact_phones' and description 'List all phone numbers for a contact' indicate data retrieval with no modification or side effects.
Attacks that exploit this kind of access
List all phone numbers for a contact. It is categorised as a Read tool in the CATS MCP Server MCP Server, which means it retrieves data without modifying state.
Register the CATS MCP Server MCP server in PolicyLayer and add a rule for list_contact_phones: 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 CATS MCP Server. Nothing to install.
list_contact_phones 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 list_contact_phones 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 list_contact_phones. 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.
list_contact_phones is provided by the CATS MCP Server MCP server (vanman2024/cats-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.
Teams ship this data inside their own products. See what a licence covers →