getAvatar

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

No annotations provided, so description must disclose behavioral traits. It only states 'Returns' without indicating if it's a read-only operation, auth requirements, or side effects. Behavior is under-specified for a mutation-free tool.

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?

Extremely concise: one sentence that gets straight to the point. No extraneous information. Front-loaded and efficient.

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 no output schema and low annotations, description fails to explain what the avatar response looks like (e.g., URL, binary data, content type). Incomplete for an agent to understand the return value.

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% (parameter 'userId' has description 'The User ID.'). Description adds no additional meaning beyond schema. Baseline 3 applies as per rules.

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?

Description clearly states it returns the specified User Avatar. The verb 'Returns' and resource 'User Avatar' are clear, distinguishing it from sibling 'updateAvatar' (mutate) and 'getUser' (different resource). However, it does not explicitly differentiate from similar 'get' tools or explain what the avatar represents (e.g., image data or URL).

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?

No guidance on when to use this tool versus alternatives like 'getUser' or other 'get' tools. No context about prerequisites or typical use cases. The description is purely definitional.

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