create_account

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

Annotations already set readOnlyHint=false, idempotentHint=false, and destructiveHint=false. The description adds no behavioral details beyond stating it creates an account. Given the annotations, the bar is lower, but no extra context (e.g., permissions, return value) is provided.

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 concise, consisting of two short sentences. The first sentence states the action, and the second provides context. No unnecessary words 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?

Given the tool's complexity (six parameters, output schema exists), the description is reasonably complete. It covers the primary purpose and hints at the use case. However, it could mention the return value or note that the account will appear in subsequent queries. With the output schema handling return details, this is adequate.

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?

The description mentions three parameters (name, currency, balance) but the input schema covers all six with full descriptions. Since schema coverage is 100%, the description adds minimal additional meaning beyond the schema. Baseline score of 3 is appropriate.

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 tool's function: 'Create a new account in your portfolio.' It uses a specific verb-resource pair ('Create a new account') and distinguishes from sibling tools like delete_account and update_account by focusing on creation.

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 provides general use context ('useful for organizing your investments across different account types or platforms') but lacks explicit guidance on when to use this tool versus alternatives (e.g., update_account for modifications). No exclusions or prerequisites are mentioned.

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