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

Annotations already declare readOnlyHint=true, idempotentHint=true and destructiveHint=false, and the description reinforces this with 'opens nothing by itself', so there is no contradiction. It adds genuinely non-obvious context beyond annotations: the response is procedural guidance (screens, buttons, fields) and the reason the tool exists is that AestheticsPro publishes no public API and sells API access only as custom Enterprise work.

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 first two sentences are front-loaded and do the real work of telling an agent what to expect. The third sentence about AestheticsPro's $350/month Enterprise API is verbose, includes an odd future-dated 'checked 11 Nov 2026' stamp, and could be compressed to a clause, though it does justify the browser-based workaround.

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 guidance tool with no output schema, the description covers the essential points: what is returned (step-by-step screens, buttons, fields) and what to do next (cotlet_browser_* in the Cloud Browser). It stops short of stating prerequisites such as an active Cloud Browser session or what to do if the guidance does not match the user's UI.

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 zero parameters and the schema is fully closed (additionalProperties: false), so there is nothing for the description to disambiguate. Baseline for a no-parameter tool applies.

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 specific resource (an AestheticsPro appointment) and clarifies the real verb: it returns step-by-step instructions rather than creating anything, which corrects the potentially misleading tool name. It also names the cotlet_browser_* tools as the execution path, though it does not contrast itself with sibling create/book/modify appointment tools.

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 a clear two-step workflow (call this for guidance, then act via cotlet_browser_* in the Cloud Browser), which is useful implied usage. It never says when to prefer this over siblings such as aestheticspro_book_an_appointment_online, aestheticspro_schedule_a_virtual_appointment, or aestheticspro_modify_appointment, leaving alternative selection to inference.

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