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

Annotations already cover the safety profile (readOnlyHint=true, openWorldHint=false, idempotentHint=true, destructiveHint=false), lowering the bar. The description adds that it compares/returns URLs to cite, which is mild useful context, but says nothing about result format, match behavior, or ranking. With annotations doing the safety work, a 2 reflects thin added behavioral value.

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 brief and front-loads the comparison attributes, but it is slightly garbled ('Ищет по сравнению пляжей') and mixes Russian and English awkwardly. It is not wasteful, but the structure is rough enough to cost precision.

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 simple two-parameter read-only search with full schema coverage and no output schema, the description is barely adequate. It conveys scope and the comparison dimensions, but does not explain result shape, match semantics, or how it differs from sibling lookup tools.

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%, so both parameters (query and limit) are already documented in the schema, including the 1-10 bound. The description adds no syntax or format detail beyond what the schema provides. Baseline 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 states a specific verb and resource: it searches/compares Phuket beaches by named attributes (side of island, shore length, airport road, walking-distance infrastructure, nearby live cam). This is clear and concrete, though it does not explicitly distinguish itself from sibling search tools like search_faq or search_guides.

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 explicit when-to-use guidance, no mention of alternatives, and no exclusion criteria. The 'cite returned URLs' instruction is an output-usage note rather than selection guidance. An agent must infer that this is a lookup-by-name tool.

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