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

Annotations already cover the safety profile (readOnlyHint=false, destructiveHint=false, idempotentHint=false, openWorldHint=false), so the bar is lower. The description adds real behavioral context beyond that: headsetPolicy null clears the policy (a mutation side-effect), sourceUrl is REQUIRED when level=required, and rules must not be invented. It stops short of stating permission requirements or duplicate/ordering 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 purpose, then a dense param block where every parenthetical earns its place given the zero schema coverage. It is long but not padded, and the nested headsetPolicy rules are grouped logically.

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 annotations cover the safety profile. The nested headsetPolicy object is thoroughly specified. Gaps remain around authentication/authorization and what happens when adding a stop that already exists, but nothing essential to invoking the tool correctly is missing.

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?

With 0% schema description coverage, the description carries the load and mostly succeeds: it enumerates body fields and gives non-obvious semantics the schema cannot, such as groupThreshold applying to groups LARGER than the value, reason being in the content's language, and the conditional sourceUrl requirement. linkedInfoCardId and linkedSlideIndex are named but their meaning is left unexplained, so it is not fully compensating.

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 ('Add a schedule stop to a template'), which clearly distinguishes it from sibling mutators like add_template_info_card and add_text_slide. It doesn't explicitly name an alternative tool, but the resource is precise enough to route correctly.

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 meaningful conditional guidance embedded in the headsetPolicy block ('Only set level=required when a written rule exists and you have its https source; never invent rules'), but it governs a parameter rather than the tool choice. No explicit when-to-use vs update_template_schedule_stop or delete_template_schedule_stop is provided, so usage is only implied.

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