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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint, so the safety profile is covered. The description adds useful behavioral detail beyond annotations: returned dates are plain calendar dates exactly as scheduled, and the range starts today. This helps set output expectations without contradicting the annotations.

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 description is compact, front-loaded with the primary purpose, and contains no fluff or redundant detail. The additional sentence about calendar dates adds value without bloating the text.

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 read-only tool with one optional parameter, complete schema coverage, helpful annotations, and an output schema, the description provides enough context to call the tool correctly. The only minor gap is lack of explicit sibling differentiation, but overall nothing critical is missing for effective invocation.

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?

Schema description coverage is 100%, and the description's 'days_ahead' text is essentially identical to the schema property description. It repeats the default and max values rather than adding new semantic meaning, so the baseline score of 3 is appropriate.

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 clearly states the action ('Get'), the resource ('upcoming scheduled workouts'), and the scope ('starting with today'). It is easily distinguishable from sibling tools like get_workout_detail or get_activities, so an agent can understand what this tool provides without opening other schemas.

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 phrase 'upcoming scheduled workouts' implies use for future scheduled workouts, and 'starting with today' plus 'days_ahead' gives clear retrieval context. However, the description does not explicitly name alternatives or state when not to use this tool, so some usage inference is required.

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