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

Annotations already declare readOnlyHint=false, destructiveHint=true, and idempotentHint=true, so the safety profile is partly covered. The description adds meaningful behavioral rules beyond annotations: headsetPolicy null clears the value, sourceUrl is required when level=required, and required rules must be backed by a written source rather than invented.

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 front-loaded with the purpose before parameter details, and every sentence carries relevant constraint or semantics. It is dense but appropriately sized for a tool with a complex nested policy object, though the nested parenthetical formatting is somewhat packed.

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 an output schema present, the description need not explain return values, and annotations cover much of the safety profile. However, it omits partial-update semantics, does not describe linkedInfoCardId or linkedSlideIndex, and gives no routing against sibling add/delete/reorder tools, leaving clear gaps for a destructive nested update operation.

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 for the main parameters and the complex nested headsetPolicy object. It explains id and stopId types, lists body fields, and gives constraints for level, groupThreshold, reason, sourceUrl, and sourceLabel. It does not cover linkedInfoCardId or linkedSlideIndex, preventing a 5.

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 opens with a specific verb and resource: 'Update a schedule stop.' This clearly distinguishes it from sibling tools such as add_template_schedule_stop, delete_template_schedule_stop, and update_template_info_card. An agent can identify the operation without opening the schema.

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 description does not state when to use this tool versus alternatives like add_template_schedule_stop, delete_template_schedule_stop, or reorder_template_schedule_stops. The conditional rule for headsetPolicy.level is useful parameter guidance, but it is not tool-selection guidance.

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