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

No annotations are provided, so the description carries the full burden. It does disclose two real behavioral traits: results are sorted ascending by monthly USD price, and each result includes article and provider links. It says nothing about result volume limits beyond the schema, pagination, or rate/auth requirements.

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, no filler, and the core capability is front-loaded before the result-format detail. Every clause earns its place.

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 a fully documented five-parameter schema and no output schema, the description usefully compensates by describing the return contents (article and provider links) and ordering. The remaining gap is the absence of any routing guidance relative to its two siblings.

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 every one of the five parameters is documented in the schema with defaults, bounds, and examples (e.g. 'Europe, Osaka, or Los Angeles'). The description adds no parameter-level meaning beyond what the schema already provides, so the baseline of 3 is appropriate.

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 gives a clear verb+resource ('Search published VPS plan prices') and even states the ordering, so the agent knows what it returns. It does not explicitly distinguish itself from the sibling tools compare_providers or get_provider, which is the only thing keeping it from a 5.

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 use this tool versus compare_providers or get_provider, and no stated prerequisites or exclusions. Usage is only loosely implied by the discussion of prices and sorting. A searcher vs a comparator vs a single-provider fetcher is a meaningful distinction that goes unaddressed.

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