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

No annotations are provided, so the description carries the full burden and does not meet it. It doesn't say whether the existing asset is replaced or a new version is added, whether the call is synchronous or long-running, or what attach/start_media_generation do — all critical for a mutation that overwrites generated output.

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?

It's a single front-loaded sentence with no filler, so nothing is wasted. But brevity here comes at the cost of substance — the parenthetical reads like an internal note rather than agent-facing guidance.

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?

Eight parameters, one of them an enum, no annotations, and no output schema — this is a complex mutation tool whose description covers none of the operational detail an agent needs. It doesn't even say what comes back (asset ID, status) or how regeneration interacts with scheduling/publishing.

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% (just notification_message), and the description adds nothing about the other seven parameters. Undocumented booleans like attach and start_media_generation and the context_file_ids array are left entirely ambiguous, and 'required instructions' doesn't clarify asset_instructions' format or expected length.

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 names a specific verb and resource ('Regenerate row asset') and distinguishes itself from the sibling generate_calendar_row_asset by noting that new instructions are supplied. It's clear enough to pick out of a long sibling list, though 'row asset' remains domain jargon without further grounding.

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 parenthetical 'same as generate with required instructions' implies this is the variant to use when re-running generation on an existing row asset, but it never states when to choose regenerate over delete-then-generate, or what preconditions (existing asset, row state) must hold. Usage is implied rather than prescribed.

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