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

The annotations already declare readOnlyHint=true and openWorldHint=true, and the description adds useful behavioral context by disclosing the 4-credit cost and the specific external feeds involved. It does not describe pagination or return behavior, but the cost disclosure is a meaningful addition beyond the annotations.

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 description is one tightly written sentence with the core scope front-loaded and the credit cost appended efficiently. Every clause earns its place, with no redundant restatement of the title or schema.

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 3-parameter, read-only trending-feed tool, the description covers purpose, platforms, no-topic scope, and cost. It does not explain output structure or pagination, but no output schema exists and the essential call context is present.

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 67%, with region and platform already documented in the schema, including defaults. The description does not add further meaning for limit, region, or platform beyond what the schema provides, so it meets the baseline for a partially documented schema.

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 identifies a specific resource and scope: trending videos right now, without a topic, from TikTok or YouTube Shorts. It implicitly distinguishes itself from topic-based siblings such as search_viral_content by emphasizing 'without a topic,' though it does not name the alternative directly.

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?

The description implies the tool is for no-topic trending feeds and notes the credit cost, which gives some usage context. However, it does not explicitly state when to use this instead of siblings like search_viral_content or similar_content, leaving the alternative path to inference.

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