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

The description adds the behavioral context that this produces a user-visible native notification on the paired computer, and clarifies it is not a conversational response. Annotations are all false or neutral, so the description bears most of the burden here. It could disclose more about delivery guarantees, platform limitations, or whether the notification is ephemeral, but for a simple tool this is adequate.

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?

Two short sentences, both purposeful: one states the use case and context, the other prevents common misuse. Every word earns its place and the key message is front-loaded.

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?

The tool is simple, the schema fully documents the parameters, an output schema exists, and the description provides clear usage boundaries. The only minor gap is not mentioning platform-dependent behavior or that the notification is transient, but these are not essential for a basic call. Overall, the description is complete enough for correct invocation.

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?

Schema coverage is 100%, so every parameter is already described in the input schema. The description does not add any parameter-specific meaning beyond what the schema provides. This meets the baseline but adds no extra value.

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?

The description clearly states the tool is for showing a visible native desktop notification on the paired computer, making its purpose evident. It also distinguishes itself from replying in chat, which helps separate it from a common misuse. It could be more direct by using an explicit verb like 'displays' or 'sends', but the intended action is unambiguous.

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?

The description explicitly says when to use the tool: when the user wants a visible native desktop notification on the paired computer. It also gives a clear when-not case by stating it should not replace a chat reply. No alternative tool is named, but the guidance is sufficient for typical selection.

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