fetch_doc_page

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

With no annotations provided, the description carries full burden. It discloses that it fetches and returns content as markdown, but lacks details on error handling, rate limits, authentication needs, or response format beyond markdown. It adds some context about domain restriction and dependency on search_docs, but behavioral traits are incomplete.

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 front-loaded with the core purpose, followed by usage rules. Each sentence adds value: first defines the action, second explains the output format and use case, third specifies the input source and domain restriction, fourth provides the workflow context. No wasted words.

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 1 parameter with 0% schema coverage and no output schema, the description does well by explaining parameter semantics and usage context. It covers the tool's role in the workflow with search_docs. However, without annotations or output schema, it lacks details on errors, performance, or exact return structure, leaving some gaps.

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 explains that the 'url' parameter must be from the docs.powertools.aws.dev domain and obtained from the search_docs tool, adding crucial semantic context beyond the schema's basic URI type. However, it doesn't detail URL format or validation 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?

The description clearly states the verb ('fetches') and resource ('content of a Powertools documentation page'), specifying it returns markdown. It distinguishes from its sibling 'search_docs' by explaining that this tool is for detailed content retrieval after search results are obtained.

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?

It provides explicit guidance on when to use this tool ('after finding relevant pages with search_docs') and when not to use it (the URL must be from docs.powertools.aws.dev domain, not arbitrary URLs). It names the alternative tool ('search_docs') and specifies the prerequisite input source.

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