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

The annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered. The description adds useful information beyond that by naming what is returned, the full document body plus URL, which matters because no output schema exists. It says nothing about error behavior for invalid ids, document size, or truncation, so the added behavioral value is moderate rather than rich.

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?

A single short sentence that front-loads the action and states both what comes in (the id from search) and what comes out (full body and URL). There is no redundant restatement of the title or the annotations, and nothing could be removed without losing information.

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 one-parameter, read-only, closed-world retrieval tool with full annotation coverage, the description is nearly sufficient: it names the input source and the returned payload. The only shortfall is the absence of any note on failure modes or size limits, which for a document-fetching tool would help an agent handle edge cases.

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 single `id` parameter is documented with an example value (used-ev-battery-check), so the schema already does the heavy lifting. The description contributes by explaining the provenance of that id, namely that it comes from search results, which is meaning beyond the schema's own text. Beyond that origin hint it adds no format or constraint details.

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?

States a specific verb and resource: it retrieves the full body text and URL of a CarVoltLab document. The phrase "search 결과의 id 로" distinguishes it from the sibling `search` tool by clarifying that this is the follow-up retrieval step rather than the discovery step, so an agent can tell the two apart.

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?

Usage is implied rather than stated: the id must come from a prior `search` result, which effectively communicates the correct sequence of tool calls. However, there is no explicit when-not guidance, no mention of what happens with an id that is not from search or that no longer exists, and no statement about when to prefer the other siblings such as `carvoltlab_faq` or `carvoltlab_report_items`.

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