test_now_assist_skill

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

Annotations already declare readOnlyHint and openWorldHint. The description adds a meaningful prerequisite—'requires NOW_ASSIST_ENABLED'—which is beyond what annotations provide. It also clarifies the intent (verifying behavior) but does not detail side effects or return format; however, with the readOnly hint, the bar is lower.

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, focused sentence that front-loads the action and purpose. It includes the critical environment requirement without any redundant or extra wording.

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 tool with only two well-documented parameters and a simple testing purpose, the description is fairly complete. It states what it does and a key precondition. The only gap is not explaining what the expected response contains, but this is mitigated by the simplicity and the presence of annotations.

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 input schema covers both parameters with descriptions, achieving 100% coverage. The tool description adds no additional parameter information beyond the schema, so it meets the baseline without enhancing semantics.

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 verb ('Invoke') and clearly identifies the resource ('a Now Assist skill') and the purpose ('to verify behavior'). It distinguishes from sibling tools like get_now_assist_skill or list_now_assist_skills by focusing on testing with input.

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 implicitly conveys when to use the tool: when you need to test a Now Assist skill with sample input. It does not explicitly name alternatives or when-not conditions, but the context is clear enough for an agent to differentiate from retrieving or listing skills.

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