update_storage_box_subaccount

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

Annotations already establish a non-destructive, idempotent mutation with open-world reach, and the description adds a genuinely useful behavioral fact: labels replace the whole set rather than merge. It does not say what happens to omitted fields or how the replacement semantics behave with a partial label map.

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 front-loaded sentence states the operation and the key labels caveat, followed by a short routing clause. Nothing is redundant or padded.

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 five-parameter mutation tool with no output schema, the definition covers the field list, the riskiest semantic detail (label replacement), and sibling routing. Remaining gaps, namely omitted-field behavior and identifier meaning, are minor because the identifiers are described in the schema.

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 40%, and the description compensates for the two non-obvious fields by naming the updatable attributes and flagging the replace-not-merge behavior of the nested labels object. It says nothing about the id and subaccount_id identifiers (documented in schema) or about optional-field omission leaving values unchanged.

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?

Names a specific verb and resource ('Update a subaccount's') and enumerates exactly which fields are mutable (name, description, labels), which lets an agent separate it from the many sibling update tools at a glance.

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?

Explicitly routes two adjacent concerns elsewhere by naming change_storage_box_subaccount_home_directory and update_storage_box_subaccount_access_settings, so the agent knows what this tool does not cover. It stops short of stating prerequisites or that unrelated subaccount properties cannot be changed here.

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