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

Annotations already declare readOnlyHint, openWorldHint and destructiveHint=false, so safety is covered; the description adds real value by disclosing that comparison is scoped to a database of registered copyrighted works and that results include similarity scoring, TRO litigation history, and a radar-based assessment. No auth, rate-limit, or cost context, which keeps it below 5.

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 purpose is front-loaded in sentence one, which is good, but the keyword trigger list is long and the final sentence ('Even if the user does not explicitly say copyright...') largely restates the trigger sentence before it. Roughly a third of the text is redundant.

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?

With no output schema, the description carries the burden of telling the agent what comes back, and it does name the three result components. Read-only semantics are covered by annotations and the three parameters are fully documented in the schema, so an agent has enough to invoke it correctly.

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%, so the baseline is 3. The description marginally enriches the schema by naming the radar-based infringement assessment (implying what enableRadar produces) and similarity scoring, but it says nothing about topNumber or imageUrl constraints, all of which stay in 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?

The opening sentence gives a specific verb and resource — detect image copyright infringement risk by comparing against a database of registered copyrighted works — plus the outputs (similarity score, TRO history, radar assessment). It is clearly distinct from the patent and trademark siblings by resource type, though it never names those siblings explicitly, so 4 rather than 5.

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?

Provides a rich list of trigger phrases (copyright detection, image infringement check, TRO risk, rights owner lookup) and explicitly covers the implicit case where the user doesn't say 'copyright'. It stops short of when-not-to-use guidance or routing to the closely related trademark/patent/TRO detection siblings that an agent could easily confuse it with.

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