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

Annotations already declare readOnlyHint=true, destructiveHint=false, idempotentHint=true, so the safety profile is covered; the description usefully confirms "opens nothing by itself," meaning no browser session is launched. It also discloses the API situation ("no self-serve API for business owners"), explaining why the browser path exists. It does not specify the shape of the returned guide (length, whether it covers multiple review types).

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 constraint (returns instructions, opens nothing) is front-loaded, but the sentence is padded with channel marketing ("from ChatGPT, Claude or any AI agent") and a dated API-check note that adds little to invocation decisions. It is one long run-on rather than cleanly segmented statements.

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-param, no-output-schema guide tool, the description covers what it returns, that it has no side effects, and what to do next. The only shortfall is that it does not indicate whether the guide is generic or context-specific, which matters since no review identifier can be supplied.

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, so there is nothing for the description to disambiguate; baseline 4 applies. The description correctly implies no inputs are needed by describing a generic step-by-step return.

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?

"Reply to review in the user's own Booksy account" is a specific verb+resource, and the description immediately clarifies the actual mechanism: it "Returns how to do it in Booksy step by step (screens, buttons, fields)" rather than performing the reply. It also names the sibling family it hands off to (cotlet_browser_*), so an agent can tell this apart from booksy_list_bookings or the browser 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 states the trigger (replying to a review) and the required follow-up ("then do it with the cotlet_browser_* tools in the user's Booksy Cloud Browser"), which is the key routing decision. It does not explicitly say when NOT to use it (e.g., that it is unnecessary if the agent already knows the Booksy UI), leaving a minor gap.

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