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

With no annotations, the description carries the full burden and falls short. It doesn't say whether the source screenshot is preserved, whether this creates a new screenshot entity, what permissions are needed, or what happens if the target platform set is invalid.

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 wasted words and the core action front-loaded. However, the brevity reflects under-specification rather than tight editing, so it is only minimally adequate.

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 a mutation-style tool with zero annotation coverage, no output schema, and two fully undocumented parameters, the description is too thin. It should at least indicate source preservation, error behavior, or the relationship to the sibling copy/move/duplicate tools.

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 neither screenshotId nor targetPlatformSetId is documented in the schema. The description only loosely implies them via 'a screenshot' and 'another platform set', adding no format, source-scope, or ID-resolution detail to compensate for the coverage gap.

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?

States a specific verb ('Copy') and resource ('screenshot') plus the destination concept ('another platform set'), which maps cleanly to the two required parameters. It is reasonably distinguishable from duplicate_screenshot and move_screenshot, though it never explicitly contrasts itself with either.

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 when-to-use guidance, no prerequisites, and no distinction from the closely related siblings duplicate_screenshot, move_screenshot, or add_screenshot. An agent must guess whether 'copy' means duplicating in place, moving, or creating a new screenshot on a target platform set.

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