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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false, so the safety profile is covered. The description adds genuinely non-obvious behavior: the tool returns procedural guidance rather than performing work, and 'opens nothing by itself' — critical to prevent an agent assuming the time was logged. It does not mention auth/account prerequisites or what happens if the user has no Minuba Cloud Browser session.

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 sentence is well front-loaded, but 'from ChatGPT, Claude or any AI agent' is filler, and the closing API paragraph with a specific checked date is tangential justification that dilutes the operational content. A tighter version would keep the guidance flow and drop the vendor/API aside.

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 parameterless, no-output-schema guidance tool, the description adequately conveys the return shape (screens, buttons, fields) and the required follow-up step. Missing only edge cases such as missing browser session or unauthenticated Minuba account, which an agent would otherwise have to discover at call time.

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 the baseline is 4. Nothing in the schema needs elaboration, and the description does not waste space restating it.

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 makes clear this tool does NOT log time itself but returns step-by-step instructions ('Returns how to do it in Minuba step by step (screens, buttons, fields) and opens nothing by itself'). This disambiguates the misleadable 'log_time' name. It could be sharper about the verb — the actual action is 'retrieve guidance' — but the distinction from the browser siblings is explicit.

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 usage flow concretely: call this first, then perform the action with the cotlet_browser_* tools in the user's Minuba Cloud Browser. It also pre-empts the 'why not just use the API' question by noting the API key is not self-serve and no MCP server exists. It does not differentiate from the sibling cotlet_app_guide, which plausibly overlaps.

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