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

With no annotations provided, the description must carry the burden of behavioral disclosure. It adds context by stating the key is 'persistent' and has an 'od_' prefix, which are useful traits. However, it does not disclose side effects (e.g., key creation count limits), security implications (e.g., confidentiality of the key), or whether the key is returned in the response. Thus it provides some but not enough transparency.

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 with no filler words. It front-loads the core action and then adds a specific detail. It is efficient, but its brevity contributes to missing information, so it's not a perfect 5.

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 has 2 parameters (one required), no annotations, and no output schema, the description is far too sparse. It does not explain the purpose of 'name' or the meaning of 'scopes,' nor does it describe what the response contains or how to use the generated key. This is a minimal viable description at best, but for an API-key generation tool with auth and scopes, it is contextually 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 description coverage is 0%, and the description does not explain either parameter ('name' or 'scopes'). The descriptions for these parameters are not included, and the tool description offers no clues about what 'name' represents (e.g., a label for the key) or how 'scopes' controls permissions. This leaves the agent without any semantic guidance.

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 action: 'Generate a persistent API key (od_ prefix).' The verb 'generate' plus the resource 'API key' makes the purpose explicit. It also adds a distinguishing detail (the 'od_' prefix) that sets it apart from sibling tools like create_account or sign_in, which are not about API key generation.

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 mentions 'Requires auth' as a prerequisite but provides no guidance on when to use this tool vs alternatives or when not to use it. There is no mention of scenarios like creating keys for different environments or integrating with other tools. It only gives a condition, not usage context.

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