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

With zero annotations, the description carries the full behavioral burden, yet it says nothing about whether generation is synchronous or async, expected latency, cost/quota, or what happens when attach is true. Only the attach-optionality hint is added, which is thin for a generation tool that mutates calendar state.

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?

A single short sentence with no waste, but that brevity comes at the cost of under-specification rather than economy. The key information (asset type, attach) is front-loaded, which is the one structural strength.

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 an 8-parameter generative tool with no annotations and no output schema, the description is far too thin. An agent cannot tell what context_file_ids or asset_instructions affect, nor how start_media_generation changes the flow, from this definition.

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 only 13% across 8 parameters, so the description must compensate and does not. It implicitly covers asset_type (image/video) and attach, but leaves calendar_id, row_id, context_file_ids, asset_instructions, notification_message, and start_media_generation completely unexplained.

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 verb+resource: generating an image or video asset for a calendar row, with the optional attach behavior. It does not distinguish this from the sibling 'regenerate_calendar_row_asset', leaving a real ambiguity about which to pick.

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?

No guidance on when to use this versus 'regenerate_calendar_row_asset', 'asset_from_drive', or 'get_row_generate_asset_context'. No prerequisites (e.g., whether the row must already exist or be in a particular state) are mentioned.

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