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

No annotations are provided, so the description carries the full behavioral burden. It discloses ordering ('newest first') and that only 'published' agents are returned, but says nothing about pagination, result limits, or whether results are truncated — significant for a list endpoint with no annotations.

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?

Two short sentences, front-loaded with the primary action and scope. No wasted words, though it's arguably too terse given the uncovered parameters.

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?

With no annotations, no output schema, and 0% schema description coverage across two parameters, the description leaves the tag parameter and pagination behavior entirely unexplained. It's insufficient for an agent to invoke confidently.

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%, so the description must compensate. It mentions a 'category' filter but never mentions the 'tag' parameter, which is completely undocumented in both schema and description. The category enum values are already in the schema, so the description adds little.

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?

States a clear verb+resource (list agents) and adds the specific domain ('published One Agent a Day agents') plus ordering ('newest first'). It doesn't explicitly distinguish itself from the siblings get_agent and search_agents, so this is a 4 rather than a 5.

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 mention of an optional category filter implies when to use this rather than search or get, but there's no explicit when-to-use guidance or naming of the sibling alternatives. Usage is only inferable.

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