Check YouTube channel name

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It does not explain what the tool actually returns (e.g., a boolean, list), how the check is performed, potential edge cases, or any side effects. This is a significant gap for a tool that performs a comparison-based check, leaving the agent uncertain about the tool's output and behavior.

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 a single, concise sentence that is front-loaded with the main verb 'Check'. It contains no superfluous words or redundant information. However, it is perhaps too brief, lacking important behavioral details, but that is a completeness issue rather than a conciseness issue, so it earns a 4 for structure.

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?

The tool has only one parameter, no output schema, and no annotations, making the description the primary source of context. The description explains the basic purpose but fails to convey what the tool actually returns or how collisions are detected. Without output schema or annotations, the description should be more complete about the tool's behavior and results, but it is insufficiently detailed.

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?

The input schema fully describes the 'query' parameter with a description and example, so schema coverage is 100%. The description does not add any additional semantic meaning beyond what the schema already provides; it merely repeats the concept of a channel name or handle. The baseline of 3 is appropriate because the schema does the heavy lifting, and the tool description adds little value.

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 clearly states the verb 'Check' and the resource 'channel name or handle', and it distinguishes from sibling tools by focusing specifically on channel name/handle collisions rather than titles or niches. However, it does not clarify what 'returned YouTube channel results' means or the exact nature of a collision, so it is specific but not fully precise.

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 usage when you need to verify if a channel name/handle collides with existing YouTube results, but it does not explicitly say when to use this tool over alternatives like check_youtube_title. There is no mention of when not to use it or what distinguishes it from similar checks, so the guidance is only implied.

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