create_db_instance_account

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

No annotations are provided, so the description carries the full burden. It states 'create' (implying mutation), but it does not disclose behaviors like required permissions, idempotency, uniqueness constraints, or what happens if the account already exists. This is minimal disclosure.

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 concise list of parameters following the action statement. Every line is necessary, and the action is front-loaded. No extraneous text.

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?

Given 6 parameters, no output schema, and no annotations, the description is incomplete. It lacks details on return values (just 'dict[str, Any]'), error conditions, prerequisites (e.g., instance must exist), and behavioral constraints like password policy or account name uniqueness.

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%, so the description must compensate. It lists all six parameters with brief descriptions (e.g., 'The region ID of the RDS instance'), and for account_type it gives an example 'Normal,Super'. This adds some value but does not provide constraints or formats beyond the parameter names.

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 'Create a new account for an RDS instance.' It uses a specific verb and resource, and is distinct from sibling tools like describe_db_instance_accounts (read-only) or modify_db_instance_description (modify).

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 implies the tool is used when you need to create a new account, but it does not explicitly state when to use it versus alternatives, nor does it specify prerequisites or conditions. Usage is implied but not guided.

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