AI agents call list-timezones to retrieve information from Worldtime without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves a static list of timezone data from TimeZoneDB. It performs no modifications, deletions, code execution, or financial operations. The blast radius of misuse is minimal—an agent could only retrieve information already publicly documented. This is a straightforward Read operation.
From the tool's definition Tool name 'list-timezones' and description 'List out all available time zones' indicate a query/retrieval operation with no side effects.
Attacks that exploit this kind of access
List out all available time zones supported by TimeZoneDB. It is categorised as a Read tool in the Worldtime MCP Server, which means it retrieves data without modifying state.
Register the Worldtime MCP server in PolicyLayer and add a rule for list-timezones: 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 Worldtime. Nothing to install.
list-timezones 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-timezones 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-timezones. 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-timezones is provided by the Worldtime MCP server (usrrname/worldtime-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
list-timezones is one line of Worldtime'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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