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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds useful content context by naming the technique taxonomy the response is broken down by, plus an illustrative China/TCP-reset example. It stays silent on return format, data freshness, and whether values are per-country aggregates or raw counts, which is the remaining gap for a read-only analytic tool.

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?

Front-loaded with the core value proposition, then the technique list, then the usage rule. It is a single flowing sentence plus a short clause, with the China example earning its place as a concrete illustration. Slightly heavy on enumeration but nothing is wasted.

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 single-optional-param, read-only tool with 100% schema coverage and no output schema, the description is nearly complete: it explains purpose, scope, technique categories, and the country-vs-global switch. It could note data time range or aggregation level, but nothing essential to correct invocation is missing.

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% — the schema already documents country_code as an optional ISO 3166-1 alpha-2 code with an 'Omit for all countries' note. The description's 'omit for a global all-country view' largely restates that, adding only a format example (CN). Baseline 3 is appropriate when the schema does the work.

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+resource ('breakdown of blocking techniques') and enumerates the technique dimensions (DNS manipulation, TCP-reset injection, Tor blocking, DPI/middlebox, etc.), so an agent knows exactly what this returns. The 'how a country censors, not just what' framing distinguishes it from the summary/index/'what is blocked' siblings, though it never names the closely related get_censorship_technique_trend.

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?

It gives one concrete usage rule ('Omit country_code for a global all-country view'), which is genuinely helpful. However it never states when to use this over alternatives like get_censorship_technique_trend, get_censorship_intent, or get_censorship_summary, leaving the agent to infer the distinction from the description's framing alone.

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