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

Annotations already declare readOnlyHint=false, destructiveHint=true, and openWorldHint=false, lowering the burden. The description adds that the target is the connected user's unit-category choices, but it does not disclose the critical mutation semantics — whether the supplied array replaces all existing choices or merges with them — which matters a lot given destructiveHint=true.

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 tight sentence with the object of the update front-loaded. It earns its place without padding, though it is arguably too terse given the tool's destructive nature.

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 not be explained. However, for a destructive mutation with a 0%-documented parameter, the definition omits replacement semantics, valid category/unit values, and any auth/permission expectations, leaving real gaps.

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% for the single 'settings' parameter, so the description must compensate. 'Unit-category choices' does convey that the array holds category/unit pairs, which is some added meaning, but it does not explain allowed categories, unit values, or whether the whole array is required to be complete.

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 concrete verb (update) and a specific resource (unit-category choices for the connected TuneWorks user), which is narrower than the sibling update_user_preferences. It does not explicitly differentiate itself from get_user_settings or update_user_preferences, so it stops short of a 5.

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 no when-to-use context, no prerequisites, and names no alternative tool. An agent cannot tell from this text when unit settings should be changed versus using get_user_settings to read them or update_user_preferences for other settings.

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