youtube_auth_url

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

No annotations are provided, so the description must carry the full burden. It mentions 'local desktop app client secret' but does not disclose side effects, redirect behavior, or any state changes. The description is vague on what the URL does beyond creation.

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 sentence with no wasted words. However, it uses technical jargon ('local desktop app client secret') which may reduce clarity for some agents. Still efficient.

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 0 parameters and no output schema, the description is minimal. It does not explain the return value (the URL), how to use it (e.g., open in browser), potential errors, or the expected next step in the flow. More context is needed for a complete understanding.

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 has 0 parameters (100% coverage description). The description adds no parameter details because there are none, but it could explain why no parameters are needed (e.g., secrets are preconfigured). Adequate given the baseline for zero parameters.

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 'Create', the resource 'Google OAuth URL', and the context 'using the local desktop app client secret'. It distinguishes this tool from siblings like youtube_auth_exchange_code which handles the next step.

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 this is the first step in OAuth flow, but it does not explicitly state when to use this tool vs alternatives or provide a usage protocol (e.g., 'Use this then call youtube_auth_exchange_code'). Guidance is implicit from naming.

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