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

No annotations are provided, so the description carries the full burden. It discloses the free nature (no credit charged) and the data source (RSS feed), which are useful behavioral traits. However, it does not elaborate on potential failure modes, rate limits, or the exact response structure beyond stating publish dates. The description adds some value but is not comprehensive for a tool with zero annotation coverage.

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, front-loaded with the core purpose, then adds cost and use-case context. Every sentence earns its place with no redundant information. It is efficient and well-structured.

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 tool is simple (one parameter, no output schema). The description states it returns newest uploads with publish dates, which is sufficient for an agent to understand the expected result. It does not cover errors or edge cases, but for a straightforward read-only tool the description is largely complete. Minor gaps like response format detail are not critical.

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 coverage is 100% and the schema already describes the channel parameter as 'Channel @handle, URL, or UC… id.' The tool description repeats this essentially verbatim, adding no additional format or usage details. Since the schema carries the full burden, the description does not meaningfully augment it, so the baseline of 3 is appropriate.

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 (get a channel's newest uploads) and resource (channel), with a specific limit (up to 15) and source (RSS feed). It is unambiguous, but it does not explicitly distinguish from sibling tools like get_channel_videos, even though the RSS feed and limit imply a narrower scope. Thus it meets the 'specific verb+resource' but lacks explicit sibling differentiation.

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 use cases: 'ideal for monitoring channels, daily recaps, and did they post this week? checks.' This gives context for when to use it. However, it does not state when NOT to use it or name alternative tools. It offers clear context without explicit exclusions.

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