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

Annotations already declare readOnlyHint=true, openWorldHint=true, and destructiveHint=false, so the safety profile is covered. The description adds useful fidelity context ('missing and null fields remain unchanged; monetary values retain their original unit and runtime type'), but says nothing about ordering, pagination behavior, or whether the creator must exist in the given market.

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?

The first sentence is front-loaded but nearly content-free, and the bulk is a long comma-delimited list of runtime field names that is dense to parse. The list earns some place because there is no output schema, but it crowds out the routing and behavior information that would be more valuable.

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, enumerating expected row fields does give the agent a picture of the return payload, which is the main strength here. However, for a paginated, market-scoped list tool the definition omits sort order, total counts, pagination termination, and the creator-to-live relationship, leaving real gaps.

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% and all four parameters (id, country enum, page, pageSize with max 10) are documented in the schema, so the baseline of 3 applies. The description adds no parameter-level meaning beyond restating a field inventory, and never clarifies that id is a creator ID or how country interacts with results.

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 resource (TikTok Creator Related Lives) but the verb is a vague 'Provider business records', which doesn't explicitly say it lists livestreams for a given creator ID. With siblings like creator_related_videos, creator_related_products, and live_search/live_detail, the definition does not articulate how this resource differs from those.

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 at all — nothing about preferring live_search for keyword lookup or live_detail for a single room, and no note that the required id is a creator ID whose lives are returned. The agent must infer the call context entirely from the schema.

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