manifest

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

No annotations are provided, so the description must carry the full burden for behavioral disclosure. It only states 'Fetch', implying a read operation, but does not mention side effects, authentication needs, error handling, or constraints like rate limits. This is insufficient for an uninformed agent.

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, well-structured sentence that immediately states the action and the result. It is concise with no extraneous words, and the key information ('Fetch a structured action manifest') is front-loaded.

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 simple one-parameter tool, the description covers the basic purpose but lacks context on error scenarios, expected output format (no output schema provided), or the nature of 'structured action manifest'. It is minimally adequate but not fully complete.

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% (no descriptions in the schema for the 'url' parameter). The tool description does not add any meaning beyond the schema; it merely states the overall purpose without elaborating on the parameter's format, constraints, or role. The parameter name 'url' is self-explanatory, but the description fails to compensate for the schema gaps.

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 fetches a structured action manifest (clickable/fillable/submittable elements) for a web page. It specifies the verb 'fetch' and the resource 'action manifest for a web page'. However, 'structured action manifest' is jargon that could be clarified, and no differentiation from siblings is needed as none exist.

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 no guidance on when to use this tool versus alternatives, nor any prerequisites or context. As a simple fetch tool, it is implicitly for retrieving manifest data from a URL, but the lack of any usage direction reduces clarity.

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