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

With no annotations, the description carries the full burden of behavioral disclosure. It adds a meaningful guarantee—'Always returns the latest authoritative snapshot (is_latest) per asset'—which is not evident from the tool name or schema. This is valuable, though it omits details like pagination or error handling, so not a 5.

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, each serving a distinct purpose: the first identifies the tool's core function, the second provides a key behavioral guarantee. There is no redundant information, making it highly concise and easy to parse.

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's moderate complexity (2 optional params, no output schema), the description adequately covers its purpose and a notable behavior (is_latest). It could be more explicit about the response structure or sorting, but it is sufficiently complete for an agent to understand what to expect.

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?

Parameter descriptions in the schema are comprehensive, covering all semantics including defaults and enum options. The tool description adds no extra parameter-related context beyond what the schema already explains, so the baseline of 3 applies.

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 function: retrieving a list of crypto assets the authenticated user has favorited on AudioAlpha. The verb 'Get' is specific, the resource is well-defined, and the mention of 'is_latest' adds precision. It is easily distinguishable from sibling tool get_my_favorite_podcasts.

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 provides clear context that this is for the authenticated user's favorites, which helps in selecting this tool over generic market snapshot tools. However, it does not explicitly state when not to use it or name alternative tools for comparison, so it falls short of a 5.

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