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 danger profile is covered. The description adds the non-obvious 'you own' ownership precondition, which is genuine value beyond the schema. However, it says nothing about cascade behavior — whether contained files/subfolders are deleted or orphaned — which is the critical unknown for a destructive container delete.

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?

One short, front-loaded sentence with the verb first and zero filler. The only minor redundancy is restating the resource name, and the brevity is not at the cost of structure.

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 destructive, irreversible-feeling container deletion with no output schema, the description is under-specified: it omits cascade/contents behavior, failure modes (not found, not owner), and whether the operation can be undone. An agent could call it correctly syntactically but not safely.

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?

Single parameter with 100% schema description coverage, so baseline 3 applies. The description adds no meaning about the id beyond what the schema already says ('The spreadsheet_folder id.') and doesn't clarify ID format or scope (tenant vs. personal).

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 ('Delete') and resource ('spreadsheet_folder'), plus an ownership qualifier. It is clearly distinguishable from spreadsheet_folder_create/read/update/list among siblings, though it doesn't explicitly contrast with spreadsheet_file_delete (deleting contents vs. the container).

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 versus alternatives (e.g., file delete, or updating/moving a folder). The 'you own' phrase implies a permission precondition but nothing states prerequisites, confirmation expectations, or what to do if the folder is non-empty.

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