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

The annotations only indicate readOnlyHint=false and destructiveHint=false, which are minimal. The description adds crucial behavioral info: the api_token is shown once and must be stored and used as a bearer token. This is beyond the annotations and essential for correct usage.

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 two sentences, with the purpose stated first and the token handling second. No redundant information, well-structured and front-loaded.

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 simple sign-up tool, the description covers the main purpose and token handling, but it omits any explanation of the optional 'name' parameter. Given the lack of an output schema, the description is the only source of return-value info, which it provides. However, the parameter gap and lack of any error or prerequisite info make it incomplete.

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 schema has one optional parameter 'name' with no description, and schema description coverage is 0%. The tool description does not mention the 'name' parameter at all, leaving the agent without any guidance on what it does or whether to provide it. The description fails to compensate for the lack of schema documentation.

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 verb 'Create' and the resource 'hashn agent account', which is distinct from sibling tools like create_invite or create_workspace. It also mentions the return of api_token, making the purpose unambiguous.

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 use case (creating an account) but does not explicitly contrast with alternatives like redeem_invite or create_workspace. It provides no 'when not to use' guidance, though the purpose is clear enough that an agent can infer it.

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