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

Annotations already declare readOnlyHint=true, openWorldHint=false, idempotentHint=true and destructiveHint=false, and the description is consistent with them. It adds genuinely useful context beyond the annotations by stating 'opens nothing by itself,' so an agent knows no browser session or navigation occurs. However, it says nothing about failure modes (e.g., what happens if the user is not signed in) or how the returned steps are scoped for a zero-parameter call.

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 operating instruction is front-loaded in the first sentence, which is good. The final sentence is padded: it repeats 'ClassPass's official API' twice, names the product again, and includes a dated parenthetical ('checked 28 Oct 2026') that adds little for an agent deciding how to call 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?

For a zero-parameter, read-only guide tool with no output schema, the essentials are present: what it returns (steps with screens, buttons, fields) and that it performs no action. What is missing is any sense of scope or fidelity of those steps (single flow vs. multiple report types) and what to do if the described UI does not match what the agent encounters in the browser.

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 nothing for the description to disambiguate; the baseline of 4 applies. The description does not promise optional filters that the empty schema would contradict.

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 and resource ('Get reservation report in the user's own ClassPass account') and crucially clarifies that it returns step-by-step instructions rather than the report data itself, which corrects the impression created by the name. It does not explicitly differentiate itself from siblings like classpass_get_payout_report or classpass_list_reservations, but the resource is distinct enough to route correctly.

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?

Gives an explicit workflow: call this first to obtain the screens/buttons/fields, 'then do it with the cotlet_browser_* tools in the user's ClassPass Cloud Browser.' It also explains why the official Inventory API is not an option (approved partners only), which preempts a common misstep. It stops short of naming when-not-to-use conditions or alternatives for obtaining the same data.

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