Upload file

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

Annotations already indicate this is a non-read-only, non-destructive operation in a closed world. The description adds useful behavior that parent directories are created automatically, but it does not disclose overwrite behavior, error cases, or permission requirements.

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 two sentences, front-loaded with the main action and followed by one relevant behavioral detail. There is no unnecessary text.

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 simple two-parameter upload tool with complete schema descriptions and useful annotations, the description covers the core action and auto-creation of parent directories. It could be stronger by mentioning overwrite/conflict behavior, but no output schema is present and return values do not need explanation.

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 100%, so the schema already explains both source and path. The description adds little parameter-specific meaning beyond reinforcing that source may be a directory and destination is in Filen cloud.

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 and resource: upload a local file (or directory) from the server machine into Filen cloud. It is clear on direction and scope, but it does not explicitly differentiate from nearby siblings such as write_file or create_folder.

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 description implies the use case by saying it uploads local files/directories into the cloud, but it does not explicitly state when to choose this over write_file or download_file. No when-not or prerequisite guidance is given.

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