Returns all currently active (live) calls on the 3CX system. Each call includes caller/callee info, duration, and status. Returns an empty array if no calls are in progress. Use this for
AI agents call get_active_calls 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 only retrieves and displays current call information from the 3CX system without modifying, deleting, or executing any actions. It is purely informational (Read category). Severity is low because exposure of call metadata, while potentially sensitive, does not enable destructive or financial actions. Confidence is high due to clear retrieval semantics and no ambiguity in the description.
From the tool's definition Tool name is 'get_active_calls' and description states it 'Returns all currently active (live) calls on the 3CX system' with call metadata (caller/callee info, duration, status).
Attacks that exploit this kind of access
Returns all currently active (live) calls on the 3CX system. Each call includes caller/callee info, duration, and status. Returns an empty array if no calls are in progress. Use this for. 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 get_active_calls: 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.
get_active_calls 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 get_active_calls 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 get_active_calls. 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.
get_active_calls 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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