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

Annotations already declare destructiveHint=true, idempotentHint=true and readOnlyHint=false, so the safety profile is carried. The description adds a genuinely useful behavioral detail, that the folder is verified through the workspace credential before anything is stored, but it never explains what the 'destructive' flag means here (e.g. whether an existing binding is replaced).

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?

Two tight sentences with the core action front-loaded and the sourcing/verification detail following. No filler or repetition of the title.

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?

An output schema exists, so return values need no explanation, and annotations cover the safety profile. Purpose, id provenance, and the pre-storage verification are all present; the only real gap is the meaning of the destructive flag, which is minor for a single-purpose binding tool.

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 coverage is only 50% because folderId has no inline description, but the description compensates by stating the id comes from fillo_list_drive_folders, giving the agent its provenance and format. The form parameter is already documented in the schema, so no addition is needed there.

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 and resource: bind a form's uploads to one Drive folder. It is immediately distinguishable from sibling tools like fillo_list_drive_folders and fillo_reset_drive_folder without opening any schema.

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?

It implies usage by pointing to fillo_list_drive_folders as the source of the id, which routes an agent to the prerequisite discovery step. However it never explicitly contrasts with the obvious alternative, fillo_reset_drive_folder, or states when not to rebind an existing folder.

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