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

With no annotations, the description carries the full behavioral burden and discloses almost nothing. "Compare" weakly implies a non-destructive read, but there is no statement about read-only status, authentication, rate limits, or what the response contains. It is essentially a restatement of the tool name.

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 words are certainly terse and front-loaded, but this is under-specification rather than conciseness — every sentence that would earn its place is missing. The brevity costs information without buying any real efficiency.

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?

There is no output schema and no annotations, so the description is the only place an agent could learn what a comparison produces and how it is shaped. It provides none of that, nor any hint that both parameters are required, which makes the definition incomplete for a two-required-parameter tool.

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%: the `slugs` description already explains the 2–4 column limit, the `is-7@ct` client suffix, and the `is-7~2` position suffix, and `region` is a documented enum. The description adds nothing beyond the schema, so the baseline of 3 applies.

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?

"Compare tanks" gives a verb and a resource, so the basic action is clear, but it never says what dimension is being compared (specifications, ratings, economics) or what a comparison returns. It also does nothing to separate itself from siblings like og_tanks_compare, tanks_specifications, or tanks_by_slug_similar, leaving the agent to guess among several plausible candidates.

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 when-to-use guidance at all: no indication of when a multi-tank comparison beats calling tanks_by_slug twice, nor when the column-suffix syntax in `slugs` is warranted. The enum on `region` shows region scoping is required, but the description supplies no routing rationale.

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