upload_file_chunk

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

The description states the action is 'append or write', implying mutation, but provides no further behavioral details (e.g., whether chunks must be sequential, error handling, or if overwrite parameter has side effects). With no annotations, more context is needed.

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 a single sentence of 15 words, which is concise and front-loaded. It avoids unnecessary details, but could be slightly more structured (e.g., bulleted list of steps or constraints).

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 no output schema, no annotations, and 5 parameters with no descriptions, the description leaves critical gaps (e.g., how the temporary file is managed, what 'complete_upload' does, chunk ordering). It is not complete enough for safe agent use.

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?

The schema has 0% description coverage for its 5 parameters, and the description does not explain any parameter (e.g., uploadId, path, chunkBase64, chunkIndex, overwrite). The only hint is 'base64 chunk', which is insufficient for correct invocation.

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 the action ('appends or writes') and resource ('one base64 chunk to a temporary upload file'), providing a specific verb-resource pair. However, it does not differentiate from sibling tools like 'complete_upload' or 'upload_file', which diminishes clarity.

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 is given on when to use this tool versus alternatives (e.g., 'upload_file' for small files, or 'complete_upload' to finalize). There is no mention of context, prerequisites, or when not to use it, leaving the agent without decision support.

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