Format an ISO date string into a human-readable newsletter header date. e.g.,
AI agents call format_newsletter_date to retrieve information from Newsletter Tools without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a simple formatting utility that takes a date string and returns a formatted representation. It retrieves/transforms data without creating, modifying, deleting, or executing any external operations. No mutations occur, no code is executed, and no financial or destructive actions are possible. This is a canonical Read operation with minimal risk.
From the tool's definition Tool description indicates it 'Format[s] an ISO date string into a human-readable newsletter header date' - a pure transformation of input data with no side effects, no data persistence, no external operations triggered.
Attacks that exploit this kind of access
Format an ISO date string into a human-readable newsletter header date. e.g.,. It is categorised as a Read tool in the Newsletter Tools MCP Server, which means it retrieves data without modifying state.
Register the Newsletter Tools MCP server in PolicyLayer and add a rule for format_newsletter_date: 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 Newsletter Tools. Nothing to install.
format_newsletter_date 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 format_newsletter_date 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 format_newsletter_date. 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.
format_newsletter_date is provided by the Newsletter Tools MCP server (josephtandle/beehiiv-mcp-mcp). 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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