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 with them ('opens nothing by itself'). It adds genuine context beyond the annotations: the response is step-by-step UI instructions (screens, buttons, fields), and there is no public CoachingPortal API, which explains why browser tools are required.

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 mechanism is front-loaded and clear, but 'from ChatGPT, Claude or any AI agent' is filler, and the closing line 'CoachingPortal's official API: CoachingPortal publishes no public API' is redundant phrasing. Two of the three sentences could be tightened considerably.

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, non-destructive guidance tool with no output schema, the description covers what matters: what it returns, that it changes nothing, and which tools carry out the actual action. Only the relationship to the similarly named sibling remains unaddressed.

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 and there is nothing for the description to compensate for. It correctly implies a parameter-free call.

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 the verb and resource (attach a client resource in the user's own CoachingPortal account) and then corrects the expectation by saying it 'Returns how to do it in CoachingPortal step by step ... and opens nothing by itself.' That makes the actual behavior distinguishable, though it never differentiates itself from the sibling coachingportal_add_resource, which sounds nearly identical.

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 workflow: call this first, then perform the action with the cotlet_browser_* tools in the Cloud Browser. That is useful implied guidance, but there is no explicit statement of when NOT to use it or why one would pick this over add_resource or any other resource tool.

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