List all available timezones
AI agents call list-timezones to retrieve information from Mcp Datetime 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 enumerates existing timezone data. It performs no modifications, deletions, code execution, or financial operations. The blast radius of misuse is minimal—an AI agent calling this repeatedly would at worst consume some compute resources but cannot modify system state or access sensitive information beyond public timezone definitions.
From the tool's definition Tool name is 'list-timezones' and description states 'List all available timezones'. The verb 'List' and the read-only nature of retrieving timezone information indicate a retrieval operation with no side effects.
Attacks that exploit this kind of access
List all available timezones. It is categorised as a Read tool in the Mcp Datetime MCP Server, which means it retrieves data without modifying state.
Register the Mcp Datetime 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 Mcp Datetime. 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 Mcp Datetime MCP server (@odgrim/mcp-datetime). 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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