create_swim_endurance_workout

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

No annotations are provided, so the description carries the full burden. It usefully discloses a side effect beyond the schema — that the workout is uploaded to Garmin Connect — but says nothing about permissions, failure behavior, whether an existing workout is overwritten, or other operational constraints.

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?

Purpose is front-loaded in the first sentence and the per-parameter list is scannable. It is slightly verbose but every line carries needed information, and nothing appears to be padding.

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?

Given seven parameters, no annotations, and an existing output schema (so return values need not be explained), the definition is nearly complete: purpose, side effect, and all parameter semantics are covered. The only gap is the lack of any routing guidance relative to its many workout-creation siblings.

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?

With 0% schema description coverage, the description must compensate fully, and it does: it documents all seven parameters, gives the pace format ("M:SS/100m"), enumerates valid stroke types, and restricts pool_length to 25 or 50. This adds substantial meaning beyond the bare 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?

States a specific verb (create), resource (swim workout), and key attribute (continuous, with pace target), which implicitly separates it from the swim_intervals sibling. However, it does not explicitly distinguish itself from create_swim_threshold_workout or create_swim_drills_workout, so an agent still has to reason about the boundary.

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?

There is no explicit when-to-use or when-not-to-use statement and no named alternative among the several create_swim_* siblings. The word 'continuous' hints at the distinction from intervals, but this is only implied and left to inference.

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