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 is consistent while adding the crucial behavioral fact that the tool 'opens nothing by itself' and merely emits instructions. It also discloses that no public API exists, explaining why the browser route is mandatory; it does not cover prerequisites such as browser session setup or what happens if none exists.

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?

It is front-loaded and short, with the actual return behavior stated in sentence two before the workflow guidance. The closing fragment 'CoachingPortal's official API: CoachingPortal publishes no public API.' is awkwardly constructed and slightly redundant, a small structural blemish in an otherwise tight description.

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 parameters, no output schema, and safety annotations present, the description covers what an agent needs: what is returned (steps, screens, buttons, fields), that nothing is mutated, and which tools to use next. It omits only whether the Cloud Browser must already be provisioned and how this differs from the check-in schedule listing 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 zero parameters, so the schema leaves nothing to interpret and the baseline of 4 applies. The description correctly signals that no input is needed and that scope is implicitly the calling user's own account.

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 first sentence names a specific verb and resource plus a scope qualifier ('the user's own CoachingPortal account'), and the second sentence immediately clarifies that the tool returns procedural guidance rather than check-in data. It does not explicitly distinguish itself from near-siblings such as coachingportal_list_check_in_schedule, so it stops short of a 5.

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?

The description gives a clear usage context: call this to get step-by-step screens/buttons/fields, then perform the action with cotlet_browser_* tools in the user's CoachingPortal Cloud Browser. It supplies no explicit exclusion (e.g., when to prefer list_check_in_schedule instead), which keeps it out of the top band.

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