Get activity data for an email address to see if it has been active recently.
AI agents call get_activity_data to retrieve information from Zerobounce without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves data about email activity status—a read-only operation with no side effects. It does not create, modify, delete, execute code, or move money. The blast radius of misuse is minimal: an attacker could only learn whether an email address is active, which is informational harm at most. Severity is low because this is passive data retrieval on publicly queryable information.
From the tool's definition Tool name 'get_activity_data' and description 'Get activity data for an email address to see if it has been active recently' indicate a query operation that retrieves historical activity information without modifying or executing any actions.
Attacks that exploit this kind of access
Get activity data for an email address to see if it has been active recently. It is categorised as a Read tool in the Zerobounce MCP Server, which means it retrieves data without modifying state.
Register the Zerobounce MCP server in PolicyLayer and add a rule for get_activity_data: 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 Zerobounce. Nothing to install.
get_activity_data 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_activity_data 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_activity_data. 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_activity_data is provided by the Zerobounce MCP server (@zerobounce/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
get_activity_data is one line of Zerobounce's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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