initialize_media_upload

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

With no annotations present, the description must carry the behavioral disclosure burden. 'Preview by default' hints at a default execution mode, but the description does not clarify what preview means, what side effects occur, whether the upload is actually initiated, or what happens when 'execute' is true.

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 short and front-loaded, with no filler words, and both sentences carry relevant information. However, it is so sparse that it omits essential structuring details about the workflow and parameters, making it concise but not appropriately sized for a 3-parameter initialization tool.

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 output schema may cover return values, but the description still leaves critical gaps: what path and body_json contain, what 'Preview by default' means, and how this step connects to finalize_media_upload. An agent cannot confidently invoke this tool correctly from the provided description and schema alone.

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 0%, so the description must explain the meaning of path, body_json, and execute. It does not define any of them; 'Preview by default' vaguely aligns with the execute default in the schema but adds no semantic value beyond what the schema already shows.

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 states a specific action ('Initialize') and a specific resource ('media upload workflow for image/video assets'), making the tool's basic purpose clear. It does not explicitly differentiate itself from the sibling finalize_media_upload, but the word 'Initialize' implies the first step of a two-phase workflow.

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 about when to use this tool versus alternatives. No mention is made of finalize_media_upload, prerequisites, or the relationship between the initialize and finalize steps, leaving the agent to infer the workflow ordering.

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