create_cycling_tempo_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 does disclose the key side effect that the workout is uploaded to Garmin Connect (a remote, non-read-only action), which is more than most siblings offer. It says nothing about authentication requirements, whether the upload is idempotent, whether it lands in the library vs. being scheduled, or failure 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?

Front-loaded with the core action and the most decision-relevant fact (upload to Garmin Connect), followed by a compact argument list. No filler sentences; only minor redundancy in restating defaults that also appear in the schema.

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 parameter documentation is solid despite 0% schema coverage. What is missing is disambiguation among the five cycling workout variants and any note on the upload's effect on the athlete's Garmin account state.

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: all five parameters are named with meaning, defaults for hr_zone/warmup_min/cooldown_min are restated, and an example value ('Tempo 60m') is given for name. Critically, it supplies the Z1-Z5 range for hr_zone, a constraint absent from the schema (no enums defined).

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+resource ('Create a tempo/threshold cycling workout') and adds a notable second action, uploading to Garmin Connect. It partially differentiates from siblings by anchoring to the endurance variant ('Same structure as endurance but with a higher HR zone default'), though it does not distinguish itself from the sweet-spot, interval, or over-under cycling workouts.

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 'Same structure as endurance but with a higher HR zone default (Z3)' gives an implicit signal for choosing this over create_cycling_endurance_workout. However, there is no explicit when-to-use/when-not-to-use guidance and no mention of how it differs from the other cycling workout creators.

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