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

Annotations already cover read-only, open-world, non-idempotent and non-destructive traits, so the bar is lower. The description adds genuinely new context: per-call credit cost, re-charging on repeated calls (consistent with idempotentHint=false), and an untrusted-data warning. It does not mention auth requirements or pagination, but the cost and safety disclosures are substantive.

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?

Three short sentences, purpose first, then pricing, then the security caveat. Every sentence carries information an agent needs, though 'Default cost ... actual cost follows your plan' is slightly hedged and could be tightened.

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 zero-parameter, read-only catalog tool with no output schema, the description covers purpose, cost, and trust posture adequately. A brief note on what the returned list looks like (office codes vs. full names) would make it fully self-sufficient, but nothing needed to invoke it correctly 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?

Zero parameters, so the baseline is 4. There is nothing for the description to clarify or mislead about, and no undocumented inputs are introduced.

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: 'List supported trademark offices and countries.' An agent can tell this is a coverage/catalog lookup rather than a brand-data query like global_brand_list or global_brand_stats. It stops short of naming those siblings explicitly, so differentiation is inferential rather than stated.

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, no prerequisites, and no reference to the sibling tools (global_brand_list, global_brand_detail, global_brand_stats) that an agent would need to choose between. The description tells you what comes back, not when to call it.

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