自定义子账号账密

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

The description explicitly discloses that the operation overwrites the username and password for each sub-account in content, which is a key behavioral trait beyond the annotations. It also conveys batch processing. No contradiction with the annotations; readOnlyHint=false is consistent with a write operation.

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?

The description is a single concise sentence that front-loads the core action and key constraints. Every phrase adds information, with no filler or repetition.

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 tool with a two-step confirmation flow via confirm_token, the description does not mention this interaction pattern, though the schema parameter description covers it. The tool is also a batch write with overwrite semantics, and the description captures that. Overall adequate but with a gap around the confirmation process.

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 100%, so the baseline is 3. The description adds only a minor clarification that multiple accounts can be passed at once, which is already implied by the array type. It does not enrich the meaning of product or confirm_token beyond the schema.

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?

The description clearly states the action: setting custom usernames and passwords for sub-accounts, supporting batch input, and overwriting existing credentials. It is specific and unambiguous, but it does not explicitly differentiate from siblings like sub_account_set_password_batch or sub_account_update_batch, so it falls 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?

No guidance is provided on when to use this tool versus alternatives such as sub_account_set_password_batch or sub_account_update_batch. The description mentions batch capability but does not state when this tool is preferred or when another tool should be used instead.

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