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

Annotations already declare readOnlyHint=false, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description adds the useful effect note that students 'see it in the app' (a user-visible side effect), but says nothing about behavior when a copy already exists — relevant given the sibling tools list_workout_copies and sync_workout_copies.

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 compact sentence with the verb front-loaded and no filler. It is efficient, though that brevity is partly the cause of the guidance gaps elsewhere.

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 3-parameter mutation tool with no output schema, the description omits what is returned or created per student, how duplicates are handled, and how day_of_week affects the copy. The agent is left guessing about the outcome of a write operation.

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 only 67%; the two described fields just point at list_catalog_workouts and list_students. The description adds nothing about how day_of_week interacts with a copied workout (does it place the workout on a specific day?) — the one parameter that is undocumented in the schema and whose meaning is genuinely ambiguous.

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?

Specific verb (copies) plus resource (catalog workout) and target (one or more students), which separates it from list_catalog_workouts and get_catalog_workout. It does not, however, distinguish itself from copy_program or sync_workout_copies, which are the closest functional siblings.

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 states only what it does, never when to choose it over copy_program or sync_workout_copies, nor when not to use it. No prerequisites (must the workout be published? must students exist?) are given, leaving the agent to infer usage from the name alone.

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