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

Annotations already declare readOnlyHint, idempotentHint, non-destructive, and closed-world, so safety is covered. The description adds useful behavioral context — that prices are 'latest' and 'official' — but says nothing about districts lacking data, how ties or missing values are handled, or whether the result includes per-district values or only the extremes.

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 sentence that front-loads the operation and scope, then states the output, with no redundant restatement of the name or schema.

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?

A simple read-only, two-parameter tool with full schema coverage and rich annotations; the description covers scope, geography, recency, and the comparison output. It is nearly complete, with only minor gaps around missing-district handling and whether per-district values are returned (no output schema exists to cover that).

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 (commodity and priceType enum) are fully documented in the schema, giving a baseline of 3. The description reinforces that only one commodity (singular) is compared, but adds no detail on priceType behavior or commodity naming beyond what the schema says.

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 (compare) and resource (latest official price of one commodity across all districts), plus the derived output (cheapest/most expensive districts). It implicitly separates itself from get_market_price and get_price_trend by being the cross-district comparison, but it never names a sibling to make that explicit.

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?

The phrase 'across all districts of Bangladesh' implies the use case is a cross-district comparison, but there is no explicit when-to-use/when-not guidance and no named alternative (e.g., use get_market_price for a single district). Usage is inferable rather than stated.

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