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

Annotations already declare this is a non-read-only, idempotent, non-destructive, non-open-world operation, so the safety profile is covered. The description adds that elapsed time is computed with breaks deducted, which is genuine behavioral context beyond the annotations. It does not say what happens to the session afterward (whether it is closed permanently, whether the computed total is returned), which would have raised the score.

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 short sentence with the action front-loaded and no filler. It is efficient, though the brevity leaves the description slightly under-structured for a mutation-style tool.

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?

With one fully documented parameter and annotations covering safety and idempotency, the core is covered. However, as a state-changing stop operation with no output schema, the description should say whether stopping is final and what the computed time result looks like, which it does not.

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 100% for the single parameter, and the schema already points to dandori_tracking_dashboard for the session ID. The description adds no meaning about the parameter beyond what the schema states, so the baseline of 3 applies.

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 and resource ('Arrêter la session de chrono') and adds the outcome that time is counted with breaks deducted. An agent can tell this ends a timing session, though it does not explicitly contrast itself with the sibling dandori_control_timer or dandori_start_timer.

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 statement of when to use this versus dandori_control_timer (likely pause/resume) or dandori_start_timer, and no prerequisites or exclusions are given. Usage is only inferable from the verb 'Arrêter' and the resource name.

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