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

Annotations already declare readOnlyHint=true, destructiveHint=false, openWorldHint=true, so the safety profile is covered. The description adds nothing beyond that – no note that it requires a country/id pair from the live search, no rate-limit or availability caveats, no hint about what is returned for a live room.

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?

Short, but short by omission: a single label-like line that carries zero information an agent didn't already have from the tool name. This is under-specification rather than genuine conciseness.

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?

With no output schema and a mutation-free but open-world read, the description should clarify what a 'live detail' record contains and how it relates to lives_search. Neither is present, so the definition is not sufficient on its own for correct selection.

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 all three parameters (id, country, include) are already documented in the schema. The description contributes no additional semantics – notably nothing about the 'include=core' extension behavior – so it sits at the baseline.

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 merely restates the name and title: 'TikTok Commerce Intelligence CJ: lives/detail API.' It conveys no verb like 'retrieve details for a live room' and offers nothing to separate it from siblings such as nexscope_data_cj_lives_search or nexscope_data_cj_lives_related_products. The 'detail' token and the required 'id' parameter hint at a single-record fetch, but only indirectly.

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, no prerequisites, and no mention of the obvious alternatives (lives_search to find a room id, lives_related_products to expand from it). An agent must infer the retrieval-vs-search distinction from the tool name alone.

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