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

Annotations already declare destructiveHint=true, readOnlyHint=false, and idempotentHint=false, so the safety profile is covered. The description adds useful quota context ('freeing its space under the 2 MB cap'), but omits whether the source file is affected and whether unloading an unloaded sheet errors — both relevant for a non-idempotent destructive call.

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?

A single front-loaded sentence with no filler; the action, scope, and side effect are all in one clause sequence. Nothing is wasted.

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 one-parameter destructive tool with no output schema, the description covers the action and the quota benefit but leaves the identifier semantics and missing-sheet behavior undefined. Annotations cover safety, so the gaps are not fatal, but the definition is only minimally sufficient.

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 0% and the single parameter 'name' is undocumented in the schema. The description never explains what 'name' is — the sheet name as given to sheet_load, a path, a case-sensitive key, or a 70-char identifier — so it fails to compensate for the coverage gap.

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 ('Delete one sheet loaded for this token'), and the 'loaded for this token' qualifier scopes it to the session context, which distinguishes it in spirit from sheet_load. It does not name the inverse sibling (sheet_load) or the file-level tools, so differentiation is implied rather than explicit.

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?

There is no guidance on when to unload versus simply leaving a sheet loaded, no mention of the corresponding sheet_load tool, and no note on what happens if the name is not currently loaded. The agent must infer usage entirely.

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