Diff Snapshot

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

No annotations are provided, so the description must fully disclose behavioral traits. However, it only states 'compare' without clarifying if the operation is read-only, if it modifies any state, what happens if no snapshot exists, or authorization requirements. Essential behavioral context is missing.

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?

Single sentence, front-loaded with the core purpose. No redundant information. However, it could be slightly more structured by breaking down usage details.

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 three parameters, no annotations, and an output schema (unseen), the description is insufficient. It lacks details on how parameters relate to snapshot selection, expected output format, and error handling (e.g., missing snapshot). The tool's functionality is underspecified for reliable agent use.

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 explain the parameters. It mentions 'previously stored snapshot' but does not define the three parameters (url, label, snapshot_path). No details on how to specify which snapshot to compare against, making the tool nearly unusable without external documentation.

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 compares the current state of a Ninova page against a previously stored snapshot. The verb 'compare' and resource 'Ninova page' with 'snapshot' are specific, and it distinguishes from siblings like snapshot_page (create) and read_page (read current).

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?

No explicit guidance on when to use this tool versus alternatives like read_page or snapshot_page. The intended use is implied (comparing pages to detect changes), but no when-not-to-use or alternative references are provided.

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