newsletter_builder

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

With no annotations, the description carries the full burden. It discloses the output components (hook, sections, CTAs, 10 subject lines), giving useful behavior context. However, it does not mention any limitations, generation time, or side effects, though for a content generator these may be less critical.

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 a single, front-loaded sentence that lists the key output components without extra filler. Every word contributes to understanding the tool's purpose and result.

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?

For a content generation tool with 6 parameters and no output schema, the description provides enough context about what the tool produces. It names the components of the generated newsletter and the 10 subject lines, which is reasonably complete, though it could mention the return format or how inputs map to sections.

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%, so the baseline is 3. The description adds no parameter-level meaning beyond the schema; it only names output components, not input semantics. The schema already documents each parameter adequately.

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: generating a complete newsletter with specific components (hook, sections, CTAs, 10 subject lines). It names the resource (newsletter) and distinguishes it from sibling tools focused on other content types like case studies or webinars.

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 implies usage (when you need a newsletter) but does not explicitly state when to prefer this tool over alternatives or mention any exclusions. The context is clear from the tool name and description, but no explicit guidance is provided.

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