Write iCloud File

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

Annotations provide destructiveHint: true, but the description adds no further behavioral context (e.g., whether file overwriting occurs, if invalid paths cause errors). The description does not expand on what 'write' entails beyond the annotation.

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 one short sentence, making it concise and front-loaded. However, it lacks substantive information, which reduces its utility. It is appropriately minimal but fails to earn its place with valuable details.

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?

Given the tool has 4 parameters, a destructive hint, and an output schema (as per context), the description is severely incomplete. It does not mention return values, error conditions, or any constraints, making it insufficient for an agent to use effectively.

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?

With 0% schema description coverage, the description must explain parameters, but it only states 'Write a file to iCloud Drive.' It does not clarify the meaning of path, content, encoding, or create_dirs, leaving the agent with insufficient information.

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 'Write a file to iCloud Drive', which is a specific action and resource. It effectively distinguishes from siblings like icloud_read, icloud_delete, and icloud_mkdir. However, it lacks explicit mention of overwrite behavior or constraints.

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 tool versus alternatives (e.g., icloud_mkdir for directory creation, icloud_move for renaming). Missing context like prerequisites or typical use cases.

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