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

With no annotations, the description carries the behavioral burden. 'Prompt discarded' is a useful disclosure that the input prompt does not influence the result, and returning a template implies a read-only operation. However, it omits details about whether the nine parameters are consumed, ignored, or required for the template, and it does not describe the output shape beyond 'three-step.'

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, both informative ('what it returns' and 'prompt handling'), with no filler or redundancy. It is appropriately brief, though the cryptic 'Prompt discarded' could be slightly clearer.

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 that simply returns a template and has no required parameters, the description plus a fully-covered optional schema may be enough to call it. Still, the relationship between the prompt-discard note and the nine declared parameters is unexplained, and with no output schema an agent is left to infer what a 'three-step thinking template' actually contains.

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 100% and the input schema provides detailed meanings for ref, url, city, feed, host, json, and path. The tool description adds no parameter semantics, but with complete schema coverage the baseline of 3 is appropriate; there is no gap to compensate for.

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 concrete action and result: 'Return a three-step thinking template.' This is a specific verb plus resource and sets it apart from sibling validation and URL-checking tools. The 'Prompt discarded' note is extra but does not explicitly distinguish it from alternatives.

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 on when to choose think-steps over sibling tools, no exclusions, and no context about the intended use case. An agent only learns what it returns, not when it should be invoked.

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