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

Annotations already establish that this is a safe read-only operation with no destructive or open-world behavior. The description adds useful domain behavior by saying it reports both recipients and whether their copy was customized, but it does not mention pagination, ordering, or other list-specific 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?

A single tight sentence that front-loads the resource and the key behavioral detail. There is no filler, and every phrase contributes to understanding what the tool returns.

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 simple one-parameter read-only listing tool with full schema coverage and annotative safety hints, the description is nearly complete: it explains the population and the customization signal. The only minor gap is the absence of any note about return shape or pagination behavior.

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 coverage is 100% for the single required parameter, and the schema already explains that workoutId is a template workout id. The description reinforces that the tool operates on a workout template, but adds no syntax, constraints, or format details beyond the schema.

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 identifies the exact result set: students who received a copy of a workout template and whether their copy was customized. That distinguishes it usefully from mutation-oriented siblings such as sync_workout_copies, though it does not explicitly name the alternative or state the verb form.

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 implies you would use it to inspect recipients of a template, but it gives no explicit when-to-use guidance, no exclusions, and no comparison to alternatives such as sync_workout_copies. An agent has to infer the usage context from the name and returned data.

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