Create Identity

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

Adds value beyond annotations by noting that returned summaries redact sensitive identity fields and hidden custom fields, though it doesn't specify exactly which fields are sensitive.

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?

Two sentences: first states purpose, second adds details on accepted data and redaction behavior. No wasted words.

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 creation tool with no output schema, the description covers purpose, usage guidance, and a key behavioral trait (redaction), though it could hint at the return structure more explicitly.

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 description's mention of 'structured identity fields plus custom fields and scoping' adds contextual grouping but no new parameter-level info.

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 it creates an identity item and specifies it's for personal, contact, and address data, distinguishing it from sibling tools like login or card.

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 says to use for personal, contact, and address data instead of a login or card, providing clear when-to-use guidance but not excluding other scenarios.

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