AI agents call get_active_numbers to retrieve information from Seven without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves account data (list of phone numbers) without modifying, deleting, or executing operations. It is a straightforward query operation. The low severity reflects that exposing a list of account numbers has limited blast radius—the data is already associated with the account and cannot directly cause financial harm or irreversible damage.
From the tool's definition Tool name 'get_active_numbers' and description 'List all active phone numbers' indicate a retrieval operation with no side effects.
Attacks that exploit this kind of access
List all active phone numbers. It is categorised as a Read tool in the Seven MCP Server, which means it retrieves data without modifying state.
Register the Seven MCP server in PolicyLayer and add a rule for get_active_numbers: 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 Seven. Nothing to install.
get_active_numbers 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_numbers 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_numbers. 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_numbers is provided by the Seven MCP server (seven-io/seven-mcp). 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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