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

With no annotations provided, the description carries the full burden of disclosing side effects, permissions, or read-only nature. The description is silent on these aspects, offering no behavioral transparency. This is a significant gap for a tool that likely performs a read operation but does not state so.

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 directly communicates the core purpose without any unnecessary details or repetition. It is well-structured and to the point.

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?

Given the absence of an output schema, the description is not required to explain return values. However, it does not provide any contextual information about the nature of the returned data, likely edge cases, or relationship to other tools. For a simple fetch, it is adequate but could be enhanced with a brief note on the expected output scope.

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 schema descriptions for parameters are present but minimal, e.g., 'The ID of the YouTube post.' Since the schema covers all parameters (100% coverage), the baseline is 3. The description does not add any additional meaning or context beyond what the schema already provides, so it meets but does not exceed 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 clearly states the action (retrieves) and the resource (detailed information about a specific YouTube community post), which distinguishes it from sibling tools like get_youtube_v3_video_details or get_youtube_v3_channel_details. However, it does not specify what 'detailed information' includes, so it falls short of a 5.

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 provides no guidance on when to use this tool compared to alternatives such as get_youtube_v3_post_comments or get_youtube_v3_channel_posts. It does not mention prerequisites or typical scenarios, leaving the agent to infer usage 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.