AI agents call notify_upcoming_deadlines to retrieve information from Todos without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves task information based on deadline proximity criteria. It performs a read-only query operation to surface upcoming deadlines for reminder purposes, with no capability to modify, delete, or execute actions. This is a classic Read category tool with minimal security risk.
From the tool's definition Tool description states 'Get tasks with deadlines approaching within the threshold', which is a retrieval operation. The verb 'Get' and the use case 'Good for reminders' indicate querying/fetching data without modification or side effects.
Attacks that exploit this kind of access
Get tasks with deadlines approaching within the threshold. Good for reminders. It is categorised as a Read tool in the Todos MCP Server, which means it retrieves data without modifying state.
Register the Todos MCP server in PolicyLayer and add a rule for notify_upcoming_deadlines: 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 Todos. Nothing to install.
notify_upcoming_deadlines 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 notify_upcoming_deadlines 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 notify_upcoming_deadlines. 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.
notify_upcoming_deadlines is provided by the Todos MCP server (@hasna/todos). 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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