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

Annotations already declare readOnlyHint=true, idempotentHint=true, openWorldHint=true, destructiveHint=false, so the safety profile is fully covered by structured data. The description adds useful behavior beyond that: it discloses pagination (limit/offset) and the empty-result semantics implying a fuzzy/approximate match threshold. A 3 reflects genuine added context, though it says nothing about how fuzzy the match is or result limits.

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 tight sentences with no waste, front-loading what is returned and following with the empty-result interpretation. Every clause earns its place.

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?

An output schema exists so return values need not be re-explained (though the description still summarizes them), and annotations cover safety and idempotency. What remains missing is routing information relative to the many fuzzy/exact-hash siblings, which is the one real gap for an agent deciding whether to call this.

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 and only partly does: it identifies limit/offset as pagination controls and fuzzy_hash as the value to match. It adds no format, default values, or constraints for any of the three parameters, leaving the schema's bare integer/string types to carry the rest.

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?

Specific verb+resource: 'Paginated list of archived script fingerprints whose fuzzy hash matches this value', and it lists the returned fields (scan, page URL, script URL). However it offers no differentiation from near-identical siblings such as search_js_fingerprint_by_fuzzy_hash (singular) and find_js_fingerprint_similar_by_hash, which an agent could easily confuse with this one.

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 only guidance is interpretive ('An empty list means no close match'), which tells the agent how to read results, not when to choose this tool. There is no mention of when to prefer it over the singular fuzzy-hash sibling or the exact-hash variants (md5/sha1/sha256), so selection is left to inference.

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