List the IANA timezone identifiers Viraly accepts for scheduling. Useful when the user mentions a city or region and you need to resolve it to a valid Timezone string (e.g.
AI agents call list_timezones to retrieve information from Viraly MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries a static or semi-static list of timezone data without side effects. It is purely informational and supports scheduling workflows by providing valid timezone options. No data is created, modified, deleted, or executed—it simply returns reference data.
From the tool's definition Tool name 'list_timezones' and description indicate it 'List[s] the IANA timezone identifiers Viraly accepts for scheduling' with no mention of modification, deletion, execution, or financial operations.
Attacks that exploit this kind of access
List the IANA timezone identifiers Viraly accepts for scheduling. Useful when the user mentions a city or region and you need to resolve it to a valid Timezone string (e.g. It is categorised as a Read tool in the Viraly MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Viraly MCP Server 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 Viraly MCP Server. 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 Viraly MCP Server MCP server (viraly-io/viraly-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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