Use this when the user asks about contacts or the phonebook:
AI agents call search_contacts to retrieve information from 3CX 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 or searches contact data from the 3CX phonebook. It performs a read-only query operation consistent with the Read category. The blast radius is minimal—unauthorized contact lookup poses privacy concerns but does not alter system state, execute code, delete data, or involve financial transactions. Severity is low as it is a standard information retrieval function.
From the tool's definition Tool name 'search_contacts' and description 'Use this when the user asks about contacts or the phonebook' indicate retrieval of contact information without modification. The verb 'search' is a query operation with no side effects.
Attacks that exploit this kind of access
Use this when the user asks about contacts or the phonebook:. It is categorised as a Read tool in the 3CX MCP Server MCP Server, which means it retrieves data without modifying state.
Register the 3CX MCP Server MCP server in PolicyLayer and add a rule for search_contacts: 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 3CX MCP Server. Nothing to install.
search_contacts 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_contacts 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_contacts. 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_contacts is provided by the 3CX MCP Server MCP server (ssig-it/3cx-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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