get_user_profile

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

The description uses 'Retrieve' implying a read-only operation, but with no annotations, it fails to disclose important behavioral traits such as required permissions, rate limits, error handling, or what happens if the username does not exist. The description adds minimal transparency beyond the bare action.

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 with a single sentence, making it easy to parse. However, it lacks structural elements like sections or bullet points that could improve readability for complex information. The brevity is acceptable for a simple tool but does not earn top marks due to minimalism.

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 absence of an output schema and annotations, the description should explain the return value or additional context. It does not describe what fields are in the user profile, how errors are reported, or any pagination or filtering. The description is incomplete for a fully autonomous agent.

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% and the description provides no additional meaning for the 'username' parameter beyond what the schema already specifies (type and minLength). There are no examples, format hints, or context, so the description does not compensate for the lack of schema descriptions.

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 'Retrieve' and the resource 'user by username', making the tool's basic function evident. However, it does not differentiate this from sibling tools like get_user_identity or get_user_contributions, leaving ambiguity about what a 'profile' specifically includes.

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?

There is no guidance on when to use this tool versus alternatives among the many user-related get tools. No mention of prerequisites, context, or exclusions, leaving the agent without decision support.

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