compare_snapshots

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

Provides a clear security warning about untrusted content and mentions fetching raw content and providing a visual diff URL. With no annotations, this is good coverage, though it could describe side effects or data handling more thoroughly.

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?

Two clear sentences plus a security note. Front-loaded with the primary action. Could be more structured but is efficient.

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?

No output schema, so description should detail return values. It mentions 'visual diff URL' and 'raw content' but does not specify the full response structure, leaving some ambiguity.

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% with descriptions for all parameters. The description adds context about default timestamps and security, but does not significantly augment parameter meaning beyond the schema.

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?

Clearly states the action 'compare two archived snapshots' and the resource 'URL' with a specific verb and resource. It distinguishes from sibling tools like check_archive_status or save_url by focusing on comparison and visual diff.

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?

Implies usage for comparing snapshots with optional timestamps, but does not explicitly state when to use this tool over alternatives like get_archived_url or when not to use it.

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