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

Annotations already convey readOnlyHint=false, so the mutation is expected. The description adds meaningful behavioral context: it moves the file, creates the destination folder if missing, and supports optional renaming. It does not specify overwrite behavior or whether the original file is removed, but the term 'move' plus the annotation profile makes the core behavior clear.

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 compact and front-loaded with the action, immediately followed by scope, side effects, and trigger phrases. There is minor redundancy with the title ('Move File to Folder' repeated at the start), but every sentence contributes useful information.

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 moderate three-parameter tool with full schema coverage and useful annotations, the description provides enough to select and invoke it correctly: what is moved, where, optional rename, folder creation, and trigger language. It does not describe the success response or overwrite behavior, and there is no output schema, but these are secondary to correct invocation.

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 documents file_id, to_path, and new_name in detail. The description's mentions of 'optionally renaming it' and 'creates the folder if it doesn't exist' paraphrase schema content rather than adding new semantic detail. This meets the baseline but does not exceed it.

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: 'Move one of the user's files — an upload or a result from a previous step — into a folder of their file storage, optionally renaming it.' This makes the operation unambiguous. It is clearly distinguished from file-creation siblings by focusing on moving an existing file into a folder, rather than writing, uploading, or merely making a 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 gives explicit trigger conditions: 'Use when the user says save / put / move / file this into a folder.' This is clear context for when to select the tool. It does not explicitly list exclusions or alternative tools (e.g., octopus_write, octopus_make_folder), so it stops short of full when-not guidance.

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