Create User API Key

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

Annotations indicate destructiveHint=true, but the description adds value by stating that the key secret is never surfaced and cannot be retrieved via MCP. This discloses a critical behavioral limitation beyond what annotations provide, though it could mention required permissions or irreversible nature.

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 extremely concise: two sentences, each adding essential information. No superfluous words, and the the purpose is 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?

The description covers purpose and a key behavioral note, but lacks parameter explanations and usage context. Given the complexity (4 params, no schema descriptions) and the presence of an output schema, more detail on parameter semantics would make it complete.

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%, meaning no parameter descriptions in the schema. The description does not explain any of the four parameters (user_id, name, expires_at, request_id), leaving the agent without guidance on values, formats, or semantics.

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 action ('Create an API key') and the resource ('for a user'). It distinguishes from sibling tools like 'create_global_api_key' by specifying user scope, and mentions that the key secret is never surfaced, which differentiates it from retrieval tools.

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 does not explicitly guide when to use this tool versus alternatives like create_global_api_key. It implies usage for user API key creation but lacks prerequisites, restrictions, or context on when not to use it.

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