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

Annotations only supply readOnlyHint and openWorldHint, and the description adds genuinely useful behavior the schema cannot: the underlying data layer is under review for false positives, comparison fields will come back null, and a review object carries the layer's window end as the data date. That is exactly the kind of disclosure an agent needs to avoid treating nulls as 'no censorship'.

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?

It is a single long compound sentence that leads with deprecation status rather than with what the tool returns or does, and the key fact (fields are null) is buried mid-sentence. The content is largely justified, but the ordering and density work against quick scanning.

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, so the description carries the burden of describing returns, and it does so adequately: two country codes, null comparison fields, and a review object with a window-end date. Given the tool currently returns no real comparison data, this is close to complete for what an agent needs.

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 coverage is 100% and both parameters already document ISO country codes with examples. The description adds nothing about the two inputs (e.g. whether same-code input is allowed or how mismatched coverage between countries is handled), so the baseline 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?

The description names the intended content (per-country national block counts, shared blocklist, per-category comparison) and the current return shape, so an agent can infer 'compare censorship between two countries'. But it never states the action in an active, front-loaded way and it is dominated by deprecation status rather than purpose. It is distinct enough not to be confused with get_country_profile or country_brief, but only by inference.

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?

No when-to-use guidance and no alternatives are named, despite obvious sibling overlap with country_brief, get_country_profile, get_co_blocking and get_national_blocklist. The only implicit guidance is that the tool is degraded, which an agent must piece together itself.

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