list_candidate_phones
AI agents call list_candidate_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 retrieves candidate phone contact information. It exhibits no side effects, creates no data, executes no code, and causes no irreversible changes. The 'list' prefix is a strong indicator of read-only query functionality. While the description is absent (reducing confidence slightly), the name is unambiguous and consistent with sibling tools on this ATS system that follow similar listing patterns.
From the tool's definition Tool name is 'list_candidate_phones' which uses the 'list' verb, a standard pattern for data retrieval operations. The description is empty, but the name alone clearly indicates querying/retrieving phone numbers associated with candidates without modification.
Attacks that exploit this kind of access
list_candidate_phones. 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_candidate_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_candidate_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_candidate_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_candidate_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_candidate_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.
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