cast_stop

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

Annotations already declare the operation as non-read-only, non-destructive, and idempotent. The description adds little beyond the core action; it does not disclose behavior when no cast is active, whether the TV session is fully terminated, or any side effects beyond stopping. This is acceptable but not highly transparent.

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 description is a single, clear French sentence that directly states the action without filler or redundancy. It is appropriately minimal for a zero-parameter tool and front-loads the essential information.

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 such a simple tool with no parameters, idempotent behavior in annotations, and no output schema, the description is largely sufficient. A minor gap is not mentioning how to verify success or that the operation targets the currently connected TV, but this is not a major omission given the tool's simplicity.

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?

The tool takes zero parameters and the input schema is fully covered (100%). With no parameters to document, the description does not need to add parameter-level semantics, so it meets the baseline for a no-parameter tool.

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 uses a specific action verb ('Arrête') and names the clear resource ('le cast en cours sur la TV'), making it obvious that this tool ends an active casting session. It is easily distinguished from siblings like cast_pause, cast_resume, and cast_status by its stop semantics.

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 intended use is implied by the verb 'stop' but not explicitly stated: there is no guidance on when to choose cast_stop over cast_pause, nor any mention of prerequisites such as an active cast. The sibling list helps infer the difference, but the description itself does not articulate it.

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