get_all_shabbat_times · Hebcal MCP Server MCP: Risk & Policy

WHAT IT DOES

What get_all_shabbat_times does on Hebcal MCP Server

AI agents call get_all_shabbat_times to retrieve information from Hebcal MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

WHY IT NEEDS A POLICY

Why get_all_shabbat_times needs a policy

This is a data retrieval operation that queries Jewish calendar information (Shabbat candle lighting and Havdalah times). It has no side effects, does not modify data, execute code, or incur financial consequences. The empty description slightly reduces confidence, but the naming convention and server context clearly indicate a read-only query function.

From the tool's definition Tool name 'get_all_shabbat_times' uses the retrieval verb 'get'; server description states it 'provides access' to calendar data and enables users to 'query' schedules.

Attacks that exploit this kind of access

Questions about get_all_shabbat_times

What does the get_all_shabbat_times tool do? +

get_all_shabbat_times. It is categorised as a Read tool in the Hebcal MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_all_shabbat_times? +

Register the Hebcal MCP Server MCP server in PolicyLayer and add a rule for get_all_shabbat_times: 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 Hebcal MCP Server. Nothing to install.

What risk level is get_all_shabbat_times? +

get_all_shabbat_times is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_all_shabbat_times? +

Yes. Add a rate_limit block to the get_all_shabbat_times 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.

How do I block get_all_shabbat_times completely? +

Set action: deny in the PolicyLayer policy for get_all_shabbat_times. 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.

What MCP server provides get_all_shabbat_times? +

get_all_shabbat_times is provided by the Hebcal MCP Server MCP server (shaymc3/hebcal-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.