Calculate the difference between two dates. Returns the difference in days, weeks, months, and years.
AI agents call date_diff to retrieve information from DateTime MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only calculation based on input dates. It queries or computes information (date arithmetic) without creating, modifying, deleting, or executing any operations. No data is persisted or changed. The blast radius of misuse is minimal—an AI agent could at worst perform unexpected date calculations, which has no security or operational impact.
From the tool's definition Tool description states it 'Calculate the difference between two dates. Returns the difference in days, weeks, months, and years.' - a pure computation that retrieves or calculates information with no side effects, no data modification, and no external…
Attacks that exploit this kind of access
Calculate the difference between two dates. Returns the difference in days, weeks, months, and years. It is categorised as a Read tool in the DateTime MCP Server MCP Server, which means it retrieves data without modifying state.
Register the DateTime MCP Server MCP server in PolicyLayer and add a rule for date_diff: 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 DateTime MCP Server. Nothing to install.
date_diff 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 date_diff 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 date_diff. 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.
date_diff is provided by the DateTime MCP Server MCP server (ryddle/datetime-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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