Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnly, idempotent, non-destructive, closed-world behavior; the description mainly repeats read-only and adds account scoping and routing. It does not describe pagination, ordering, or return shape, so beyond annotations it is adequate but not rich.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The core action and alternatives are front-loaded in the first sentences, and the routing information is compact. The appended '| EN:' keyword list is slightly extraneous but does not obscure the main instruction.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With no parameters, no output schema, and annotations that fully cover safety hints, the description provides enough context: what it lists, whose notifications, and which sibling tools to use instead. Nothing needed to invoke it correctly is missing.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

There are zero parameters and schema coverage is 100%, so the schema fully defines the call surface. The description adds no parameter detail because none is needed; baseline for a no-parameter tool is 4.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb (auflisten) and resource (Benachrichtigungen) with scope (eigene/Meldungen des angemeldeten Kontos). It explicitly distinguishes itself from ontouser_notification_read and onto_action_logs, so an agent can select it without opening schemas.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

Explicitly says to use it as an entry point to find new messages, names the alternative for marking a single notification as read, and routes admin system logs elsewhere. Covers when to use and when not to use this tool.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.