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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and a closed world, so the safety profile is covered. The description adds real value by disclosing that the return is procedural instructions (screens, buttons, fields) rather than a data payload, but it never clarifies whether the service list itself is returned, and the closing remark about the ProSolutions Paired API being unavailable is context noise rather than behavior.

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 purpose is front-loaded in the first sentence, but the second sentence is overlong with ambiguous pronouns ('how to do it', 'opens nothing by itself') and the final sentence about the official API does not clearly serve the agent's decision. Trimming the API aside would sharpen the definition.

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 output schema, the description must fully explain what comes back, and it only partly does: it says the result is a step-by-step guide, yet leaves ambiguous whether the list of online services is also returned. For a read-only lister the safety side is complete, but the return-value side remains underspecified.

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; the baseline for a parameterless tool applies. No misleading parameter guidance is present.

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?

States a specific verb and resource ('List online services') plus a scope qualifier ('in the user's own Paired Plus account'), which separates it from transactional siblings like paired_plus_book_online_appointment. It does not explicitly differentiate itself from the many other paired_plus_list_* tools, so the agent must infer from the resource name alone.

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?

Gives a clear workflow rule: this call 'opens nothing by itself' and returns a step-by-step guide, which the agent then executes via the cotlet_browser_* tools in the Cloud Browser. That is genuinely actionable when-to-use context, though it stops short of naming when a sibling list tool would be the better pick.

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