analyze_workout_execution

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

Annotations only declare readOnlyHint/openWorldHint, and the description confirms read-only while adding substantial behavioral detail: alignment is by order/duration/distance/target intensity and never by names, laps splitting one effort are merged, time past the plan is reported separately, and unpaired runs return up to three candidates. This is meaningful disclosure well beyond structured fields.

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 purpose is front-loaded and every sentence carries information, but the body is a dense, run-on block of clauses that is hard to parse on first read. It could be trimmed and bulleted without losing content.

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 9-parameter, nested-object tool with no output schema, the description does the heavy lifting well: it enumerates the per-step metrics returned, alignment confidence, deviation notes, and the unpaired fallback. A brief note on failure behavior when nothing can be paired would make it fully complete.

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% (baseline 3), and the description adds real meaning: event_id defaults to the paired event, planned_workout_doc is the add_or_update_event document format used when the event was deleted, and the tolerance parameters drive flagging/splitting behavior. The uplift over the already-complete schema is modest but genuine.

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 opening line states a precise verb+resource: check how a planned workout was executed, or evaluate each detected interval of a single activity when no plan exists. The scope is specific and clearly distinct from generic activity-listing or compliance tools, though it never names a sibling (e.g. get_plan_compliance) to sharpen the contrast.

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?

It explicitly covers the two usage modes (with a plan vs. without) and names the plan sources (planned_workout_doc, event_id, or the paired event), so an agent knows when this applies. It stops short of stating when NOT to use it or which sibling to prefer for closely-related questions.

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