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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, and the description is consistent with them by saying nothing is opened or changed. It adds useful detail that the return value is procedural text rather than an executed action, but the official-API pricing aside is tangential and does not describe limits, auth, or rate behavior of this tool itself.

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 purpose and the handoff to browser tools are front-loaded in the first sentence. The trailing API-pricing quotation is long, includes a quote-within-a-quote, and a future 'checked' date, which adds bulk without helping the agent select or invoke the tool.

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 input parameters and no output schema, the description carries the burden of explaining the return value, and it does so ('step by step screens, buttons, fields'). An agent knows what it gets back and what to do next, so the definition is sufficient for this simple guidance tool.

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 takes no parameters, so there is no parameter semantics to explain; the schema already closes the object with additionalProperties=false. Baseline for a zero-argument tool applies and the description correctly implies the account context comes from the session.

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 states a concrete resource and outcome: it returns step-by-step instructions (screens, buttons, fields) for adding a habit tracker in Exercise.com. It also pre-empts the apparent mismatch with the name by clarifying that it 'opens nothing by itself,' so an agent understands this is an instruction-retrieval tool rather than a mutating one.

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 an explicit follow-up path: retrieve the steps here, then execute them with the cotlet_browser_* tools in the user's Exercise.com Cloud Browser. That is clear sequencing guidance, though it never states a when-not-to-use case or prerequisites such as account access.

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