create_brick_swim_bike_workout

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

No annotations are provided, so the description carries full burden. It usefully discloses the external side effect ('upload it to Garmin Connect'), which the schema does not convey, but it omits auth requirements, whether a duplicate is created on repeat calls, and any scheduling 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?

The opening sentence front-loads the action and the upload side effect, and the Args block is efficient per-line; it is slightly long but each line earns its place by defining an otherwise-undocumented parameter.

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?

An output schema exists so return values need not be explained, and parameters plus the upload side effect are covered. The only gap for a mutation tool with zero annotations is the absence of prerequisite/auth and repeat-call 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 description coverage is 0%, so the description must compensate, and it does: every one of the 8 parameters is documented with units and defaults (e.g. 'swim_distance_m: Swim distance in meters (default 1500)', pace as "M:SS/100m"), giving the agent more than the bare schema titles.

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 states a specific verb and resource ('Create a swim → bike brick workout') and explicitly names the destination ('upload it to Garmin Connect'), which cleanly distinguishes it from siblings like create_brick_bike_run_workout and create_swim_endurance_workout.

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 multi-sport structure ('swim segment with pace target → bike segment with HR zone') implies the use case, but there is no explicit statement of when to pick this over a plain swim or cycling workout, nor any prerequisite or exclusion guidance.

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