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

Annotations already declare readOnlyHint/idempotentHint/destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description nonetheless adds genuinely new behavior: the tool returns procedural guidance rather than data, performs no action itself, and requires a separate browser-tool step. The API paid-add-on note, while long-winded, explains why browser automation is the path. It stops short of a 5 because it says nothing about how the returned steps are structured or what to do on failure.

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 is front-loaded and efficient, but the trailing sentence quoting 'API access is an additional feature with variable pricing' verbatim, complete with a 'checked 11 Nov 2026' timestamp, is marketing boilerplate that consumes roughly a third of the text without helping an agent decide or act. Trimming that would sharpen the definition 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-param, no-output-schema instruction tool, the description covers what is returned (steps with screens, buttons, fields), what is not done (nothing is opened), and what to do next (browser tools). Reasonably complete, though it omits how to specify which client or date range the returned steps will assume.

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 no parameter meaning to add and the schema is trivially complete; the baseline for a 0-param tool is 4. The description doesn't need to compensate for anything here.

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 names a specific verb and resource ('Export client measurements in the user's own Exercise.com account') and crucially clarifies the nature of the operation: it 'Returns how to do it ... step by step' and 'opens nothing by itself.' That prevents the common misreading that this tool performs the export. It does not, however, explicitly differentiate itself from sibling export tools such as exercise_com_export_a_client_s_logged_workouts or exercise_com_view_client_nutrition.

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 two-step workflow is spelled out: call this tool to get instructions, then execute them with the cotlet_browser_* tools in the user's Exercise.com Cloud Browser. That is clear, actionable usage context and names the follow-up alternative. There are no explicit exclusions (when NOT to use this vs. the many other export/view tools), so it stops short of a 5.

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