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

With no annotations, the description carries the burden. 'Prompt discarded' is a useful behavioral disclosure, but the description doesn't clarify whether the eight input parameters affect the result, what side effects exist, or what the returned template contains.

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?

Two short sentences communicate the core operation and a key behavioral caveat. The description is front-loaded and contains no filler.

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?

Despite a simple-sounding purpose, the tool has eight optional-looking parameters and no output schema, and the description doesn't explain how they relate to the template or when the tool should be invoked. An agent would still have to guess why the parameters exist.

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 fully documents all eight parameters with individual descriptions, so the description need not repeat them. The description adds no parameter-specific meaning, meriting the baseline for high schema coverage.

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 states a specific action and output: 'Return a three-step thinking template.' This clearly identifies the tool's purpose and distinguishes it from the domain-checking sibling tools, though it doesn't explain what the template is for.

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 guidance about when to use this tool versus any sibling. The only usage hint is 'Prompt discarded', which tells the agent not to expect custom prompt processing, but no conditions or exclusions are stated.

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