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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false. The description adds useful behavioral context beyond annotations: it opens a panel, reads connected account and available writers, does not draft/save/schedule/publish, and the user sends a writing brief back to the conversation.

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 description is three tight sentences, front-loads the core action, and each sentence adds useful scope, limitation, or interaction detail. There is no repetitive or wasted language.

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?

Given a zero-parameter UI-opening tool with rich annotations and an output schema, the description is complete enough. It explains what the tool opens, what it reads, what it does not do, and what the user does next.

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?

The tool has zero parameters, so there is no parameter semantics to document. The schema is also fully described with no required fields, making the baseline score appropriate.

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 uses a specific verb and resource: 'Open a ChatGPT panel to start original long-form articles and short-form posts.' It also distinguishes the tool from sibling content-management tools by explicitly stating what it does not do: 'Does not draft, save, schedule or publish content.'

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?

It gives clear usage context: start long-form articles or short-form posts in the user's saved voice or an authorized team writer's voice. It also provides a strong when-not boundary by excluding drafting, saving, scheduling, and publishing, though it does not name specific alternative sibling tools.

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